/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-send-receive-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 15:08:29,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 15:08:29,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 15:08:29,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-07 15:08:29,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-07 15:08:29,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-07 15:08:29,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-07 15:08:29,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-07 15:08:29,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-07 15:08:29,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-07 15:08:29,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-07 15:08:29,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-07 15:08:29,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-07 15:08:29,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-07 15:08:29,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-07 15:08:29,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-07 15:08:29,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-07 15:08:29,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 15:08:29,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 15:08:29,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 15:08:29,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-10-07 15:08:29,486 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 15:08:29,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 15:08:29,487 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 15:08:29,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 15:08:29,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 15:08:29,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 15:08:29,492 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 15:08:29,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 15:08:29,493 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 15:08:29,493 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 15:08:29,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 15:08:29,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 15:08:29,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 15:08:29,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-07 15:08:29,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 15:08:29,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-07 15:08:29,495 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-07 15:08:29,495 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 15:08:29,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-07 15:08:29,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 15:08:29,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-07 15:08:29,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 15:08:29,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 15:08:29,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 15:08:29,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:08:29,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 15:08:29,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 15:08:29,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-07 15:08:29,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-07 15:08:29,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-07 15:08:29,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-07 15:08:29,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 15:08:29,499 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 15:08:29,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 15:08:29,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 15:08:29,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 15:08:29,983 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 15:08:29,983 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 15:08:29,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2021-10-07 15:08:30,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0665c63ba/0f0cb8a479c740538ea5a06b34606a0d/FLAG71b0fbf5f [2021-10-07 15:08:30,705 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 15:08:30,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2021-10-07 15:08:30,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0665c63ba/0f0cb8a479c740538ea5a06b34606a0d/FLAG71b0fbf5f [2021-10-07 15:08:30,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0665c63ba/0f0cb8a479c740538ea5a06b34606a0d [2021-10-07 15:08:30,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 15:08:30,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-07 15:08:30,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 15:08:30,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 15:08:30,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 15:08:30,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:08:30" (1/1) ... [2021-10-07 15:08:30,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7de43a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:30, skipping insertion in model container [2021-10-07 15:08:30,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:08:30" (1/1) ... [2021-10-07 15:08:30,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 15:08:30,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 15:08:30,982 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-send-receive-alt.wvr.c[2643,2656] [2021-10-07 15:08:30,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:08:31,000 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 15:08:31,065 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-send-receive-alt.wvr.c[2643,2656] [2021-10-07 15:08:31,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:08:31,107 INFO L208 MainTranslator]: Completed translation [2021-10-07 15:08:31,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:31 WrapperNode [2021-10-07 15:08:31,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 15:08:31,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 15:08:31,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 15:08:31,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 15:08:31,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:31" (1/1) ... [2021-10-07 15:08:31,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:31" (1/1) ... [2021-10-07 15:08:31,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 15:08:31,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 15:08:31,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 15:08:31,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 15:08:31,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:31" (1/1) ... [2021-10-07 15:08:31,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:31" (1/1) ... [2021-10-07 15:08:31,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:31" (1/1) ... [2021-10-07 15:08:31,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:31" (1/1) ... [2021-10-07 15:08:31,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:31" (1/1) ... [2021-10-07 15:08:31,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:31" (1/1) ... [2021-10-07 15:08:31,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:31" (1/1) ... [2021-10-07 15:08:31,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 15:08:31,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 15:08:31,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 15:08:31,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 15:08:31,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:31" (1/1) ... [2021-10-07 15:08:31,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:08:31,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:31,323 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) [2021-10-07 15:08:31,348 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 [2021-10-07 15:08:31,398 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 15:08:31,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 15:08:31,399 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 15:08:31,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 15:08:31,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-07 15:08:31,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 15:08:31,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-07 15:08:31,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-07 15:08:31,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-07 15:08:31,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 15:08:31,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 15:08:31,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 15:08:31,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-07 15:08:31,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 15:08:31,404 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 15:08:32,302 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 15:08:32,309 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-10-07 15:08:32,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:08:32 BoogieIcfgContainer [2021-10-07 15:08:32,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 15:08:32,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 15:08:32,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 15:08:32,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 15:08:32,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:08:30" (1/3) ... [2021-10-07 15:08:32,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7656fd8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:08:32, skipping insertion in model container [2021-10-07 15:08:32,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:31" (2/3) ... [2021-10-07 15:08:32,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7656fd8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:08:32, skipping insertion in model container [2021-10-07 15:08:32,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:08:32" (3/3) ... [2021-10-07 15:08:32,324 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2021-10-07 15:08:32,332 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-07 15:08:32,332 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 15:08:32,332 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-07 15:08:32,332 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 15:08:32,385 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,385 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,385 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,385 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,386 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,386 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,386 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,386 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,387 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,387 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,387 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,387 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,387 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,388 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,388 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,388 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,388 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,388 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,389 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,389 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,389 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,390 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,390 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,390 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,391 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,391 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,392 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,392 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,393 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,393 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,393 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,393 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,394 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,394 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,394 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,394 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,394 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,394 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,395 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,395 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,395 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,395 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,395 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,396 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,396 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,396 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,396 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,396 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,398 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,398 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,398 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,399 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,399 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,400 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,400 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,400 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,400 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,400 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,401 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,401 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,401 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,401 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,402 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,403 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,403 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,403 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,403 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,404 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,404 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,404 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,404 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,404 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,404 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,405 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,405 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,406 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,406 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,406 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,406 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,407 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,407 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,407 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,407 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,408 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,408 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,408 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,408 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,408 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,409 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,409 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,411 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,411 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,411 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,412 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,413 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,418 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,423 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,423 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,424 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,425 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,425 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,425 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,426 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,426 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,426 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,426 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,427 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,427 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,427 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,427 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,427 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,428 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,428 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,428 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,428 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,428 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,429 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,429 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,429 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,429 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,429 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,429 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,430 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,430 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,431 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,431 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,431 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,431 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,432 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,432 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,440 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,440 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,440 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,441 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,441 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,441 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,441 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,443 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,443 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,444 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,444 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,444 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,444 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,444 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,445 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,445 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,445 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:32,471 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-07 15:08:32,553 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 15:08:32,577 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 [2021-10-07 15:08:32,577 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-07 15:08:32,601 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 15:08:32,615 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 130 transitions, 276 flow [2021-10-07 15:08:32,620 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 130 transitions, 276 flow [2021-10-07 15:08:32,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 126 places, 130 transitions, 276 flow [2021-10-07 15:08:32,687 INFO L129 PetriNetUnfolder]: 11/128 cut-off events. [2021-10-07 15:08:32,687 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-07 15:08:32,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 128 events. 11/128 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 126 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2021-10-07 15:08:32,695 INFO L116 LiptonReduction]: Number of co-enabled transitions 1044 [2021-10-07 15:08:39,651 INFO L131 LiptonReduction]: Checked pairs total: 1470 [2021-10-07 15:08:39,651 INFO L133 LiptonReduction]: Total number of compositions: 148 [2021-10-07 15:08:39,660 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-10-07 15:08:39,679 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 85 states have (on average 3.0470588235294116) internal successors, (259), 110 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 85 states have (on average 3.0470588235294116) internal successors, (259), 110 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:39,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 15:08:39,687 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:39,688 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 15:08:39,689 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:39,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:39,694 INFO L82 PathProgramCache]: Analyzing trace with hash 19866, now seen corresponding path program 1 times [2021-10-07 15:08:39,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:39,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344463102] [2021-10-07 15:08:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:39,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:39,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:39,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344463102] [2021-10-07 15:08:39,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344463102] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:39,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:08:39,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-07 15:08:39,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148333862] [2021-10-07 15:08:39,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:08:39,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:39,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:08:39,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:08:39,939 INFO L87 Difference]: Start difference. First operand has 111 states, 85 states have (on average 3.0470588235294116) internal successors, (259), 110 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:39,982 INFO L93 Difference]: Finished difference Result 139 states and 321 transitions. [2021-10-07 15:08:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:08:39,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2021-10-07 15:08:39,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:39,998 INFO L225 Difference]: With dead ends: 139 [2021-10-07 15:08:39,998 INFO L226 Difference]: Without dead ends: 139 [2021-10-07 15:08:40,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:08:40,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-07 15:08:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 72. [2021-10-07 15:08:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 59 states have (on average 2.7796610169491527) internal successors, (164), 71 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:40,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 164 transitions. [2021-10-07 15:08:40,046 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 164 transitions. Word has length 2 [2021-10-07 15:08:40,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:40,047 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 164 transitions. [2021-10-07 15:08:40,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:40,047 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 164 transitions. [2021-10-07 15:08:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 15:08:40,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:40,048 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 15:08:40,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-07 15:08:40,049 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash 616988, now seen corresponding path program 1 times [2021-10-07 15:08:40,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:40,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283314879] [2021-10-07 15:08:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:40,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:40,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:40,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283314879] [2021-10-07 15:08:40,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283314879] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:40,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665938570] [2021-10-07 15:08:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:40,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:40,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:40,157 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) [2021-10-07 15:08:40,181 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 [2021-10-07 15:08:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:40,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:08:40,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:40,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665938570] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:40,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:40,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2021-10-07 15:08:40,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898072966] [2021-10-07 15:08:40,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 15:08:40,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:40,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 15:08:40,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 15:08:40,309 INFO L87 Difference]: Start difference. First operand 72 states and 164 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2021-10-07 15:08:40,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:40,354 INFO L93 Difference]: Finished difference Result 207 states and 481 transitions. [2021-10-07 15:08:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:08:40,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 3 [2021-10-07 15:08:40,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:40,359 INFO L225 Difference]: With dead ends: 207 [2021-10-07 15:08:40,359 INFO L226 Difference]: Without dead ends: 207 [2021-10-07 15:08:40,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 15:08:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-07 15:08:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 73. [2021-10-07 15:08:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 60 states have (on average 2.783333333333333) internal successors, (167), 72 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 167 transitions. [2021-10-07 15:08:40,377 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 167 transitions. Word has length 3 [2021-10-07 15:08:40,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:40,377 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 167 transitions. [2021-10-07 15:08:40,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2021-10-07 15:08:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 167 transitions. [2021-10-07 15:08:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 15:08:40,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:40,378 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 15:08:40,425 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 [2021-10-07 15:08:40,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:40,592 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:40,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:40,594 INFO L82 PathProgramCache]: Analyzing trace with hash 617008, now seen corresponding path program 1 times [2021-10-07 15:08:40,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:40,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303888370] [2021-10-07 15:08:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:40,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:40,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:40,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303888370] [2021-10-07 15:08:40,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303888370] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:40,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:08:40,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-07 15:08:40,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101949849] [2021-10-07 15:08:40,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:08:40,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:40,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:08:40,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:08:40,683 INFO L87 Difference]: Start difference. First operand 73 states and 167 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:40,695 INFO L93 Difference]: Finished difference Result 72 states and 165 transitions. [2021-10-07 15:08:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:08:40,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 15:08:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:40,700 INFO L225 Difference]: With dead ends: 72 [2021-10-07 15:08:40,700 INFO L226 Difference]: Without dead ends: 72 [2021-10-07 15:08:40,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:08:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-07 15:08:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-07 15:08:40,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 2.75) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 165 transitions. [2021-10-07 15:08:40,723 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 165 transitions. Word has length 3 [2021-10-07 15:08:40,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:40,724 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 165 transitions. [2021-10-07 15:08:40,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:40,724 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 165 transitions. [2021-10-07 15:08:40,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 15:08:40,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:40,725 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 15:08:40,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-07 15:08:40,725 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:40,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:40,726 INFO L82 PathProgramCache]: Analyzing trace with hash 19127770, now seen corresponding path program 2 times [2021-10-07 15:08:40,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:40,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623396072] [2021-10-07 15:08:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:40,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:40,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:40,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623396072] [2021-10-07 15:08:40,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623396072] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:40,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72642650] [2021-10-07 15:08:40,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:08:40,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:40,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:40,793 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) [2021-10-07 15:08:40,806 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 [2021-10-07 15:08:40,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 15:08:40,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:08:40,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:08:40,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:08:40,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72642650] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:40,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:08:40,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2021-10-07 15:08:40,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614578227] [2021-10-07 15:08:40,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:08:40,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:40,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:08:40,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:08:40,890 INFO L87 Difference]: Start difference. First operand 72 states and 165 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:40,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:40,898 INFO L93 Difference]: Finished difference Result 71 states and 164 transitions. [2021-10-07 15:08:40,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:08:40,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 15:08:40,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:40,900 INFO L225 Difference]: With dead ends: 71 [2021-10-07 15:08:40,901 INFO L226 Difference]: Without dead ends: 71 [2021-10-07 15:08:40,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:08:40,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-07 15:08:40,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-10-07 15:08:40,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 2.7586206896551726) internal successors, (160), 68 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:40,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 160 transitions. [2021-10-07 15:08:40,910 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 160 transitions. Word has length 4 [2021-10-07 15:08:40,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:40,910 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 160 transitions. [2021-10-07 15:08:40,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:40,911 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 160 transitions. [2021-10-07 15:08:40,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 15:08:40,911 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:40,912 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 15:08:40,949 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 [2021-10-07 15:08:41,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:41,126 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:41,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:41,127 INFO L82 PathProgramCache]: Analyzing trace with hash 19125578, now seen corresponding path program 1 times [2021-10-07 15:08:41,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:41,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044958738] [2021-10-07 15:08:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:41,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:41,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:41,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044958738] [2021-10-07 15:08:41,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044958738] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:41,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:08:41,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-07 15:08:41,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072357192] [2021-10-07 15:08:41,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:08:41,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:41,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:08:41,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:08:41,215 INFO L87 Difference]: Start difference. First operand 69 states and 160 transitions. 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) [2021-10-07 15:08:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:41,241 INFO L93 Difference]: Finished difference Result 77 states and 168 transitions. [2021-10-07 15:08:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:08:41,242 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 [2021-10-07 15:08:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:41,243 INFO L225 Difference]: With dead ends: 77 [2021-10-07 15:08:41,243 INFO L226 Difference]: Without dead ends: 75 [2021-10-07 15:08:41,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:08:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-07 15:08:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2021-10-07 15:08:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 2.769230769230769) internal successors, (144), 62 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 144 transitions. [2021-10-07 15:08:41,251 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 144 transitions. Word has length 4 [2021-10-07 15:08:41,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:41,251 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 144 transitions. [2021-10-07 15:08:41,252 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) [2021-10-07 15:08:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 144 transitions. [2021-10-07 15:08:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-07 15:08:41,252 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:41,252 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:41,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-07 15:08:41,253 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:41,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:41,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1459611487, now seen corresponding path program 1 times [2021-10-07 15:08:41,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:41,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693847629] [2021-10-07 15:08:41,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:41,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:41,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:41,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693847629] [2021-10-07 15:08:41,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693847629] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:41,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:08:41,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-07 15:08:41,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434638949] [2021-10-07 15:08:41,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:08:41,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:41,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:08:41,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:08:41,309 INFO L87 Difference]: Start difference. First operand 63 states and 144 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-10-07 15:08:41,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:41,355 INFO L93 Difference]: Finished difference Result 81 states and 171 transitions. [2021-10-07 15:08:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:08:41,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 7 [2021-10-07 15:08:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:41,357 INFO L225 Difference]: With dead ends: 81 [2021-10-07 15:08:41,357 INFO L226 Difference]: Without dead ends: 64 [2021-10-07 15:08:41,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 15:08:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-07 15:08:41,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-07 15:08:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 145 transitions. [2021-10-07 15:08:41,364 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 145 transitions. Word has length 7 [2021-10-07 15:08:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:41,365 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 145 transitions. [2021-10-07 15:08:41,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-10-07 15:08:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 145 transitions. [2021-10-07 15:08:41,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 15:08:41,366 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:41,366 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:41,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-07 15:08:41,366 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:41,367 INFO L82 PathProgramCache]: Analyzing trace with hash -333546145, now seen corresponding path program 1 times [2021-10-07 15:08:41,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:41,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298897440] [2021-10-07 15:08:41,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:41,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:41,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:41,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:41,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298897440] [2021-10-07 15:08:41,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298897440] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:41,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100011585] [2021-10-07 15:08:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:41,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:41,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:41,454 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) [2021-10-07 15:08:41,475 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 [2021-10-07 15:08:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:41,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:08:41,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:08:41,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100011585] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:41,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:08:41,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2021-10-07 15:08:41,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084503935] [2021-10-07 15:08:41,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:08:41,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:41,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:08:41,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:08:41,568 INFO L87 Difference]: Start difference. First operand 64 states and 145 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) [2021-10-07 15:08:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:41,584 INFO L93 Difference]: Finished difference Result 32 states and 67 transitions. [2021-10-07 15:08:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:08:41,584 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 [2021-10-07 15:08:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:41,585 INFO L225 Difference]: With dead ends: 32 [2021-10-07 15:08:41,585 INFO L226 Difference]: Without dead ends: 22 [2021-10-07 15:08:41,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:08:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-07 15:08:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-07 15:08:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 21 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) [2021-10-07 15:08:41,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 43 transitions. [2021-10-07 15:08:41,589 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 43 transitions. Word has length 8 [2021-10-07 15:08:41,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:41,589 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 43 transitions. [2021-10-07 15:08:41,589 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) [2021-10-07 15:08:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 43 transitions. [2021-10-07 15:08:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 15:08:41,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:41,590 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:41,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-07 15:08:41,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:41,805 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:41,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:41,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1749995310, now seen corresponding path program 1 times [2021-10-07 15:08:41,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:41,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716347442] [2021-10-07 15:08:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:41,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:42,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:42,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716347442] [2021-10-07 15:08:42,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716347442] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:42,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102368989] [2021-10-07 15:08:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:42,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:42,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:42,313 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) [2021-10-07 15:08:42,329 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 [2021-10-07 15:08:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:42,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 15:08:42,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:42,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 279 [2021-10-07 15:08:42,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-07 15:08:42,776 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:08:42,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-07 15:08:42,885 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:08:42,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-07 15:08:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:43,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102368989] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:43,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:43,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:08:43,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043751113] [2021-10-07 15:08:43,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:08:43,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:43,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:08:43,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:08:43,036 INFO L87 Difference]: Start difference. First operand 22 states and 43 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) [2021-10-07 15:08:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:43,404 INFO L93 Difference]: Finished difference Result 38 states and 74 transitions. [2021-10-07 15:08:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 15:08:43,405 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 15:08:43,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:43,406 INFO L225 Difference]: With dead ends: 38 [2021-10-07 15:08:43,406 INFO L226 Difference]: Without dead ends: 38 [2021-10-07 15:08:43,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:08:43,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-07 15:08:43,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2021-10-07 15:08:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 2.125) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 68 transitions. [2021-10-07 15:08:43,411 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 68 transitions. Word has length 9 [2021-10-07 15:08:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:43,412 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 68 transitions. [2021-10-07 15:08:43,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) [2021-10-07 15:08:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 68 transitions. [2021-10-07 15:08:43,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 15:08:43,413 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:43,413 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:43,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-07 15:08:43,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:43,625 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:43,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1749995309, now seen corresponding path program 1 times [2021-10-07 15:08:43,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:43,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114632288] [2021-10-07 15:08:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:43,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:43,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:43,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114632288] [2021-10-07 15:08:43,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114632288] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:43,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084490013] [2021-10-07 15:08:43,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:43,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:43,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:43,883 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) [2021-10-07 15:08:43,915 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 [2021-10-07 15:08:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:43,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-07 15:08:43,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:44,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:08:44,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 97 [2021-10-07 15:08:44,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-07 15:08:44,200 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:08:44,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-07 15:08:44,302 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:08:44,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2021-10-07 15:08:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:44,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084490013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:44,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:44,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:08:44,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197800042] [2021-10-07 15:08:44,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:08:44,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:44,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:08:44,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:08:44,439 INFO L87 Difference]: Start difference. First operand 34 states and 68 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) [2021-10-07 15:08:44,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:44,864 INFO L93 Difference]: Finished difference Result 38 states and 74 transitions. [2021-10-07 15:08:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 15:08:44,865 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 15:08:44,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:44,866 INFO L225 Difference]: With dead ends: 38 [2021-10-07 15:08:44,866 INFO L226 Difference]: Without dead ends: 38 [2021-10-07 15:08:44,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 453.0ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:08:44,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-07 15:08:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2021-10-07 15:08:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 64 transitions. [2021-10-07 15:08:44,870 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 64 transitions. Word has length 9 [2021-10-07 15:08:44,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:44,870 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 64 transitions. [2021-10-07 15:08:44,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) [2021-10-07 15:08:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 64 transitions. [2021-10-07 15:08:44,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 15:08:44,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:44,871 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:44,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-07 15:08:45,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:45,082 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:45,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:45,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1932960240, now seen corresponding path program 2 times [2021-10-07 15:08:45,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:45,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699596218] [2021-10-07 15:08:45,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:45,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:45,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:45,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699596218] [2021-10-07 15:08:45,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699596218] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:45,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983150867] [2021-10-07 15:08:45,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:08:45,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:45,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:45,606 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) [2021-10-07 15:08:45,622 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 [2021-10-07 15:08:45,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 15:08:45,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:08:45,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:08:45,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:08:45,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983150867] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:45,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:08:45,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2021-10-07 15:08:45,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656808034] [2021-10-07 15:08:45,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 15:08:45,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:45,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 15:08:45,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:08:45,835 INFO L87 Difference]: Start difference. First operand 34 states and 64 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) [2021-10-07 15:08:45,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:45,873 INFO L93 Difference]: Finished difference Result 42 states and 84 transitions. [2021-10-07 15:08:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:08:45,874 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 10 [2021-10-07 15:08:45,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:45,875 INFO L225 Difference]: With dead ends: 42 [2021-10-07 15:08:45,875 INFO L226 Difference]: Without dead ends: 42 [2021-10-07 15:08:45,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:08:45,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-07 15:08:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-10-07 15:08:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:45,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2021-10-07 15:08:45,879 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 10 [2021-10-07 15:08:45,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:45,879 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2021-10-07 15:08:45,879 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) [2021-10-07 15:08:45,879 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2021-10-07 15:08:45,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 15:08:45,880 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:45,880 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:45,918 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 [2021-10-07 15:08:46,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-07 15:08:46,094 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:46,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1932960239, now seen corresponding path program 2 times [2021-10-07 15:08:46,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:46,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497257952] [2021-10-07 15:08:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:46,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:46,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:46,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497257952] [2021-10-07 15:08:46,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497257952] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:46,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813873807] [2021-10-07 15:08:46,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:08:46,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:46,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:46,635 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) [2021-10-07 15:08:46,640 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 [2021-10-07 15:08:46,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 15:08:46,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:08:46,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:08:46,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:08:46,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813873807] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:46,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:08:46,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2021-10-07 15:08:46,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606391900] [2021-10-07 15:08:46,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:08:46,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:46,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:08:46,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:08:46,887 INFO L87 Difference]: Start difference. First operand 38 states and 78 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) [2021-10-07 15:08:46,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:46,916 INFO L93 Difference]: Finished difference Result 38 states and 74 transitions. [2021-10-07 15:08:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:08:46,916 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 10 [2021-10-07 15:08:46,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:46,917 INFO L225 Difference]: With dead ends: 38 [2021-10-07 15:08:46,917 INFO L226 Difference]: Without dead ends: 38 [2021-10-07 15:08:46,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-10-07 15:08:46,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-07 15:08:46,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2021-10-07 15:08:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 53 transitions. [2021-10-07 15:08:46,920 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 53 transitions. Word has length 10 [2021-10-07 15:08:46,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:46,920 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 53 transitions. [2021-10-07 15:08:46,920 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) [2021-10-07 15:08:46,921 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 53 transitions. [2021-10-07 15:08:46,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 15:08:46,921 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:46,921 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:46,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-07 15:08:47,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:47,137 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:47,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:47,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1584720831, now seen corresponding path program 1 times [2021-10-07 15:08:47,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:47,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556610817] [2021-10-07 15:08:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:47,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:47,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:47,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556610817] [2021-10-07 15:08:47,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556610817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:47,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119785750] [2021-10-07 15:08:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:47,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:47,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:47,209 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) [2021-10-07 15:08:47,219 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 [2021-10-07 15:08:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:47,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-07 15:08:47,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:47,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119785750] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:47,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:47,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:08:47,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044065791] [2021-10-07 15:08:47,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:08:47,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:47,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:08:47,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:08:47,439 INFO L87 Difference]: Start difference. First operand 26 states and 53 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-10-07 15:08:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:47,525 INFO L93 Difference]: Finished difference Result 46 states and 86 transitions. [2021-10-07 15:08:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 15:08:47,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 15:08:47,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:47,526 INFO L225 Difference]: With dead ends: 46 [2021-10-07 15:08:47,526 INFO L226 Difference]: Without dead ends: 27 [2021-10-07 15:08:47,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:08:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-07 15:08:47,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-07 15:08:47,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 2.16) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 54 transitions. [2021-10-07 15:08:47,529 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 54 transitions. Word has length 10 [2021-10-07 15:08:47,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:47,529 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 54 transitions. [2021-10-07 15:08:47,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-10-07 15:08:47,529 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 54 transitions. [2021-10-07 15:08:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 15:08:47,530 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:47,530 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:47,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-07 15:08:47,738 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,SelfDestructingSolverStorable11 [2021-10-07 15:08:47,739 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:47,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash 207775297, now seen corresponding path program 2 times [2021-10-07 15:08:47,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:47,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011514734] [2021-10-07 15:08:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:47,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:08:47,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:47,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011514734] [2021-10-07 15:08:47,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011514734] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:47,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928252135] [2021-10-07 15:08:47,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:08:47,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:47,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:47,851 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) [2021-10-07 15:08:47,861 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 [2021-10-07 15:08:47,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:08:47,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:08:48,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:08:48,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:48,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2021-10-07 15:08:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:08:48,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928252135] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:48,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:08:48,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-10-07 15:08:48,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216883006] [2021-10-07 15:08:48,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:08:48,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:48,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:08:48,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:08:48,071 INFO L87 Difference]: Start difference. First operand 27 states and 54 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) [2021-10-07 15:08:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:48,115 INFO L93 Difference]: Finished difference Result 47 states and 100 transitions. [2021-10-07 15:08:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:08:48,115 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 11 [2021-10-07 15:08:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:48,116 INFO L225 Difference]: With dead ends: 47 [2021-10-07 15:08:48,116 INFO L226 Difference]: Without dead ends: 43 [2021-10-07 15:08:48,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-07 15:08:48,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-07 15:08:48,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-10-07 15:08:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 78 transitions. [2021-10-07 15:08:48,121 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 78 transitions. Word has length 11 [2021-10-07 15:08:48,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:48,122 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 78 transitions. [2021-10-07 15:08:48,122 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) [2021-10-07 15:08:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 78 transitions. [2021-10-07 15:08:48,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 15:08:48,124 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:48,124 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:48,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-07 15:08:48,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:48,334 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:48,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:48,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2146112671, now seen corresponding path program 3 times [2021-10-07 15:08:48,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:48,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421398319] [2021-10-07 15:08:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:48,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:48,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:48,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421398319] [2021-10-07 15:08:48,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421398319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:48,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845783129] [2021-10-07 15:08:48,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:08:48,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:48,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:48,836 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) [2021-10-07 15:08:48,851 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 [2021-10-07 15:08:48,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:08:48,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:08:48,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-07 15:08:48,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:48,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:08:49,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-10-07 15:08:49,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-07 15:08:49,221 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-07 15:08:49,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-07 15:08:49,320 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-07 15:08:49,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-07 15:08:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:50,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845783129] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:50,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:50,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-07 15:08:50,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221997047] [2021-10-07 15:08:50,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:08:50,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:50,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:08:50,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:08:50,142 INFO L87 Difference]: Start difference. First operand 35 states and 78 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-10-07 15:08:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:51,088 INFO L93 Difference]: Finished difference Result 77 states and 160 transitions. [2021-10-07 15:08:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:08:51,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 15:08:51,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:51,089 INFO L225 Difference]: With dead ends: 77 [2021-10-07 15:08:51,089 INFO L226 Difference]: Without dead ends: 75 [2021-10-07 15:08:51,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1073.7ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:08:51,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-07 15:08:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2021-10-07 15:08:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 2.292307692307692) internal successors, (149), 66 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:51,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 149 transitions. [2021-10-07 15:08:51,104 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 149 transitions. Word has length 12 [2021-10-07 15:08:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:51,107 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 149 transitions. [2021-10-07 15:08:51,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-10-07 15:08:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 149 transitions. [2021-10-07 15:08:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 15:08:51,109 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:51,109 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:51,145 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 [2021-10-07 15:08:51,324 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,SelfDestructingSolverStorable13 [2021-10-07 15:08:51,325 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:51,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2146112672, now seen corresponding path program 1 times [2021-10-07 15:08:51,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:51,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745481528] [2021-10-07 15:08:51,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:51,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:51,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:51,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745481528] [2021-10-07 15:08:51,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745481528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:51,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673101610] [2021-10-07 15:08:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:51,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:51,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:51,741 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:08:51,762 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 [2021-10-07 15:08:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:51,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-07 15:08:51,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:51,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 168 [2021-10-07 15:08:52,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-07 15:08:52,189 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:08:52,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-10-07 15:08:52,275 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:08:52,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-10-07 15:08:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:52,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673101610] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:52,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:52,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2021-10-07 15:08:52,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175994232] [2021-10-07 15:08:52,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-07 15:08:52,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:52,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-07 15:08:52,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:08:52,637 INFO L87 Difference]: Start difference. First operand 67 states and 149 transitions. Second operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-10-07 15:08:53,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:53,286 INFO L93 Difference]: Finished difference Result 75 states and 161 transitions. [2021-10-07 15:08:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:08:53,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 15:08:53,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:53,288 INFO L225 Difference]: With dead ends: 75 [2021-10-07 15:08:53,288 INFO L226 Difference]: Without dead ends: 71 [2021-10-07 15:08:53,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 788.5ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:08:53,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-07 15:08:53,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2021-10-07 15:08:53,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 66 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 147 transitions. [2021-10-07 15:08:53,292 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 147 transitions. Word has length 12 [2021-10-07 15:08:53,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:53,292 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 147 transitions. [2021-10-07 15:08:53,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-10-07 15:08:53,292 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 147 transitions. [2021-10-07 15:08:53,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 15:08:53,293 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:53,293 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:53,323 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 [2021-10-07 15:08:53,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:53,508 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:53,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:53,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2146068961, now seen corresponding path program 4 times [2021-10-07 15:08:53,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:53,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831284604] [2021-10-07 15:08:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:53,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:53,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:53,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831284604] [2021-10-07 15:08:53,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831284604] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:53,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634855977] [2021-10-07 15:08:53,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:08:53,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:53,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:53,961 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) [2021-10-07 15:08:53,983 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 [2021-10-07 15:08:54,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:08:54,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:08:54,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-07 15:08:54,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:54,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 67 [2021-10-07 15:08:54,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:08:54,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-07 15:08:54,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-07 15:08:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:54,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634855977] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:54,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:54,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-07 15:08:54,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526452705] [2021-10-07 15:08:54,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:08:54,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:54,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:08:54,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:08:54,746 INFO L87 Difference]: Start difference. First operand 67 states and 147 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) [2021-10-07 15:08:55,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:55,136 INFO L93 Difference]: Finished difference Result 79 states and 165 transitions. [2021-10-07 15:08:55,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:08:55,138 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 12 [2021-10-07 15:08:55,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:55,139 INFO L225 Difference]: With dead ends: 79 [2021-10-07 15:08:55,139 INFO L226 Difference]: Without dead ends: 77 [2021-10-07 15:08:55,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 571.7ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:08:55,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-07 15:08:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-10-07 15:08:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 2.246376811594203) internal successors, (155), 70 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 155 transitions. [2021-10-07 15:08:55,143 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 155 transitions. Word has length 12 [2021-10-07 15:08:55,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:55,144 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 155 transitions. [2021-10-07 15:08:55,144 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) [2021-10-07 15:08:55,144 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 155 transitions. [2021-10-07 15:08:55,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 15:08:55,145 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:55,145 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:55,180 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 [2021-10-07 15:08:55,360 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,SelfDestructingSolverStorable15 [2021-10-07 15:08:55,361 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:55,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:55,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2146068962, now seen corresponding path program 2 times [2021-10-07 15:08:55,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:55,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558433175] [2021-10-07 15:08:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:55,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:55,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:55,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558433175] [2021-10-07 15:08:55,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558433175] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:55,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93889049] [2021-10-07 15:08:55,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:08:55,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:55,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:55,765 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) [2021-10-07 15:08:55,767 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 [2021-10-07 15:08:55,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:08:55,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:08:55,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-07 15:08:55,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:56,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:08:56,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-10-07 15:08:56,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-07 15:08:56,209 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:08:56,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:08:56,293 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:08:56,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-10-07 15:08:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:56,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93889049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:56,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:56,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2021-10-07 15:08:56,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947396396] [2021-10-07 15:08:56,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-07 15:08:56,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:56,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-07 15:08:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:08:56,628 INFO L87 Difference]: Start difference. First operand 71 states and 155 transitions. Second operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-10-07 15:08:57,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:57,133 INFO L93 Difference]: Finished difference Result 73 states and 154 transitions. [2021-10-07 15:08:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 15:08:57,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 15:08:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:57,135 INFO L225 Difference]: With dead ends: 73 [2021-10-07 15:08:57,135 INFO L226 Difference]: Without dead ends: 67 [2021-10-07 15:08:57,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 661.4ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:08:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-07 15:08:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-10-07 15:08:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 2.230769230769231) internal successors, (145), 66 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 145 transitions. [2021-10-07 15:08:57,139 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 145 transitions. Word has length 12 [2021-10-07 15:08:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:57,140 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 145 transitions. [2021-10-07 15:08:57,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-10-07 15:08:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 145 transitions. [2021-10-07 15:08:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 15:08:57,141 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:57,141 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:57,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-07 15:08:57,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-07 15:08:57,355 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:57,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:57,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1751381665, now seen corresponding path program 5 times [2021-10-07 15:08:57,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:57,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142819040] [2021-10-07 15:08:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:57,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:57,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:57,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142819040] [2021-10-07 15:08:57,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142819040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:57,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921309339] [2021-10-07 15:08:57,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:08:57,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:57,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:57,821 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) [2021-10-07 15:08:57,831 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 [2021-10-07 15:08:58,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:08:58,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:08:58,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 15:08:58,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:08:58,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921309339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:58,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:58,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2021-10-07 15:08:58,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14829525] [2021-10-07 15:08:58,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:08:58,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:08:58,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:08:58,362 INFO L87 Difference]: Start difference. First operand 67 states and 145 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2021-10-07 15:08:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:59,155 INFO L93 Difference]: Finished difference Result 119 states and 260 transitions. [2021-10-07 15:08:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:08:59,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 13 [2021-10-07 15:08:59,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:59,160 INFO L225 Difference]: With dead ends: 119 [2021-10-07 15:08:59,160 INFO L226 Difference]: Without dead ends: 117 [2021-10-07 15:08:59,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 823.2ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-10-07 15:08:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-07 15:08:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2021-10-07 15:08:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 2.3440860215053765) internal successors, (218), 94 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 218 transitions. [2021-10-07 15:08:59,165 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 218 transitions. Word has length 13 [2021-10-07 15:08:59,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:59,165 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 218 transitions. [2021-10-07 15:08:59,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2021-10-07 15:08:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 218 transitions. [2021-10-07 15:08:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 15:08:59,166 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:59,166 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:59,206 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 [2021-10-07 15:08:59,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-07 15:08:59,368 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:08:59,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:59,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1751381666, now seen corresponding path program 3 times [2021-10-07 15:08:59,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:59,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675353435] [2021-10-07 15:08:59,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:59,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:00,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:00,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675353435] [2021-10-07 15:09:00,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675353435] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:00,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449858136] [2021-10-07 15:09:00,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:09:00,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:00,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:00,622 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) [2021-10-07 15:09:00,625 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 [2021-10-07 15:09:00,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:09:00,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:00,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 15:09:00,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:09:01,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449858136] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:01,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:01,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2021-10-07 15:09:01,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013955564] [2021-10-07 15:09:01,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:09:01,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:01,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:09:01,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:09:01,203 INFO L87 Difference]: Start difference. First operand 95 states and 218 transitions. Second operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-10-07 15:09:02,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:02,633 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2021-10-07 15:09:02,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:09:02,633 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 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 13 [2021-10-07 15:09:02,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:02,635 INFO L225 Difference]: With dead ends: 107 [2021-10-07 15:09:02,635 INFO L226 Difference]: Without dead ends: 99 [2021-10-07 15:09:02,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1588.7ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:09:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-07 15:09:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2021-10-07 15:09:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 2.1797752808988764) internal successors, (194), 90 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 194 transitions. [2021-10-07 15:09:02,640 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 194 transitions. Word has length 13 [2021-10-07 15:09:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:02,640 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 194 transitions. [2021-10-07 15:09:02,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-10-07 15:09:02,641 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 194 transitions. [2021-10-07 15:09:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 15:09:02,641 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:02,641 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:02,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-07 15:09:02,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:02,850 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:02,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:02,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1751337955, now seen corresponding path program 6 times [2021-10-07 15:09:02,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:02,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73724297] [2021-10-07 15:09:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:02,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:03,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:03,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73724297] [2021-10-07 15:09:03,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73724297] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:03,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481879617] [2021-10-07 15:09:03,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:09:03,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:03,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:03,961 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) [2021-10-07 15:09:03,976 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 [2021-10-07 15:09:04,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:09:04,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:04,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 15:09:04,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:09:04,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481879617] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:04,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:04,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2021-10-07 15:09:04,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067095803] [2021-10-07 15:09:04,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-07 15:09:04,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:04,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-07 15:09:04,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:09:04,579 INFO L87 Difference]: Start difference. First operand 91 states and 194 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-10-07 15:09:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:06,063 INFO L93 Difference]: Finished difference Result 119 states and 264 transitions. [2021-10-07 15:09:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-07 15:09:06,064 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 13 [2021-10-07 15:09:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:06,065 INFO L225 Difference]: With dead ends: 119 [2021-10-07 15:09:06,065 INFO L226 Difference]: Without dead ends: 119 [2021-10-07 15:09:06,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1675.6ms TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:09:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-07 15:09:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2021-10-07 15:09:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 95 states have (on average 2.263157894736842) internal successors, (215), 96 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 215 transitions. [2021-10-07 15:09:06,071 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 215 transitions. Word has length 13 [2021-10-07 15:09:06,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:06,071 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 215 transitions. [2021-10-07 15:09:06,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-10-07 15:09:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 215 transitions. [2021-10-07 15:09:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 15:09:06,072 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:06,072 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:06,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:06,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:06,273 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:06,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:06,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1751337956, now seen corresponding path program 4 times [2021-10-07 15:09:06,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:06,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770555933] [2021-10-07 15:09:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:06,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:07,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:07,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770555933] [2021-10-07 15:09:07,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770555933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:07,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887374685] [2021-10-07 15:09:07,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:09:07,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:07,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:07,898 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) [2021-10-07 15:09:07,899 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 [2021-10-07 15:09:08,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:09:08,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:08,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 15:09:08,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:09:08,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887374685] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:08,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:08,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2021-10-07 15:09:08,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761060231] [2021-10-07 15:09:08,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-07 15:09:08,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:08,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-07 15:09:08,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:09:08,553 INFO L87 Difference]: Start difference. First operand 97 states and 215 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-10-07 15:09:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:10,471 INFO L93 Difference]: Finished difference Result 127 states and 276 transitions. [2021-10-07 15:09:10,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:09:10,471 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 13 [2021-10-07 15:09:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:10,472 INFO L225 Difference]: With dead ends: 127 [2021-10-07 15:09:10,472 INFO L226 Difference]: Without dead ends: 123 [2021-10-07 15:09:10,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2186.2ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 15:09:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-07 15:09:10,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 95. [2021-10-07 15:09:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 2.172043010752688) internal successors, (202), 94 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 202 transitions. [2021-10-07 15:09:10,478 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 202 transitions. Word has length 13 [2021-10-07 15:09:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:10,478 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 202 transitions. [2021-10-07 15:09:10,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-10-07 15:09:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 202 transitions. [2021-10-07 15:09:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 15:09:10,479 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:10,480 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:10,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:10,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:10,689 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:10,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:10,690 INFO L82 PathProgramCache]: Analyzing trace with hash 829995185, now seen corresponding path program 5 times [2021-10-07 15:09:10,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:10,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40968757] [2021-10-07 15:09:10,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:10,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:09:10,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:10,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40968757] [2021-10-07 15:09:10,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40968757] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:10,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945637254] [2021-10-07 15:09:10,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:09:10,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:10,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:10,784 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) [2021-10-07 15:09:10,799 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 [2021-10-07 15:09:11,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:09:11,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:11,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-07 15:09:11,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:11,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945637254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:11,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:11,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-07 15:09:11,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064527769] [2021-10-07 15:09:11,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:09:11,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:11,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:09:11,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:09:11,293 INFO L87 Difference]: Start difference. First operand 95 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-10-07 15:09:11,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:11,458 INFO L93 Difference]: Finished difference Result 79 states and 156 transitions. [2021-10-07 15:09:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:09:11,459 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 14 [2021-10-07 15:09:11,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:11,460 INFO L225 Difference]: With dead ends: 79 [2021-10-07 15:09:11,460 INFO L226 Difference]: Without dead ends: 64 [2021-10-07 15:09:11,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:09:11,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-07 15:09:11,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-07 15:09:11,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 2.193548387096774) internal successors, (136), 63 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 136 transitions. [2021-10-07 15:09:11,463 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 136 transitions. Word has length 14 [2021-10-07 15:09:11,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:11,463 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 136 transitions. [2021-10-07 15:09:11,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-10-07 15:09:11,464 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 136 transitions. [2021-10-07 15:09:11,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:09:11,464 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:11,464 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:11,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-07 15:09:11,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:11,669 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:11,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:11,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1373895105, now seen corresponding path program 7 times [2021-10-07 15:09:11,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:11,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245154771] [2021-10-07 15:09:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:11,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:12,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:12,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245154771] [2021-10-07 15:09:12,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245154771] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:12,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564696312] [2021-10-07 15:09:12,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:09:12,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:12,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:12,116 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) [2021-10-07 15:09:12,120 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 [2021-10-07 15:09:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:12,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 15:09:12,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:09:12,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564696312] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:12,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:12,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2021-10-07 15:09:12,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629322691] [2021-10-07 15:09:12,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:09:12,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:12,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:09:12,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:09:12,746 INFO L87 Difference]: Start difference. First operand 64 states and 136 transitions. Second operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2021-10-07 15:09:13,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:13,503 INFO L93 Difference]: Finished difference Result 106 states and 232 transitions. [2021-10-07 15:09:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 15:09:13,504 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 15 [2021-10-07 15:09:13,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:13,505 INFO L225 Difference]: With dead ends: 106 [2021-10-07 15:09:13,505 INFO L226 Difference]: Without dead ends: 106 [2021-10-07 15:09:13,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 806.3ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:09:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-07 15:09:13,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-10-07 15:09:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 2.2857142857142856) internal successors, (160), 71 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 160 transitions. [2021-10-07 15:09:13,509 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 160 transitions. Word has length 15 [2021-10-07 15:09:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:13,509 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 160 transitions. [2021-10-07 15:09:13,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2021-10-07 15:09:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 160 transitions. [2021-10-07 15:09:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:09:13,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:13,510 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:13,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:13,723 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,SelfDestructingSolverStorable22 [2021-10-07 15:09:13,724 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:13,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:13,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1373895106, now seen corresponding path program 6 times [2021-10-07 15:09:13,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:13,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146735971] [2021-10-07 15:09:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:13,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:15,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:15,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146735971] [2021-10-07 15:09:15,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146735971] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:15,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005456296] [2021-10-07 15:09:15,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:09:15,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:15,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:15,983 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) [2021-10-07 15:09:15,986 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 [2021-10-07 15:09:16,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:09:16,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:16,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 15:09:16,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:09:17,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005456296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:17,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:17,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2021-10-07 15:09:17,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832279408] [2021-10-07 15:09:17,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-07 15:09:17,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:17,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-07 15:09:17,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-10-07 15:09:17,047 INFO L87 Difference]: Start difference. First operand 72 states and 160 transitions. Second operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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) [2021-10-07 15:09:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:19,785 INFO L93 Difference]: Finished difference Result 122 states and 270 transitions. [2021-10-07 15:09:19,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:09:19,786 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 15:09:19,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:19,787 INFO L225 Difference]: With dead ends: 122 [2021-10-07 15:09:19,787 INFO L226 Difference]: Without dead ends: 122 [2021-10-07 15:09:19,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 3154.2ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 15:09:19,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-07 15:09:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 73. [2021-10-07 15:09:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 2.2535211267605635) internal successors, (160), 72 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:19,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 160 transitions. [2021-10-07 15:09:19,792 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 160 transitions. Word has length 15 [2021-10-07 15:09:19,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:19,792 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 160 transitions. [2021-10-07 15:09:19,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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) [2021-10-07 15:09:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 160 transitions. [2021-10-07 15:09:19,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:09:19,793 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:19,793 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:19,823 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 [2021-10-07 15:09:20,006 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,SelfDestructingSolverStorable23 [2021-10-07 15:09:20,007 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:20,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:20,008 INFO L82 PathProgramCache]: Analyzing trace with hash -547980814, now seen corresponding path program 8 times [2021-10-07 15:09:20,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:20,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671126079] [2021-10-07 15:09:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:20,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:20,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:20,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671126079] [2021-10-07 15:09:20,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671126079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:20,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480888187] [2021-10-07 15:09:20,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:09:20,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:20,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:20,705 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) [2021-10-07 15:09:20,711 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 [2021-10-07 15:09:21,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:09:21,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:21,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-07 15:09:21,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:21,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:09:21,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 144 [2021-10-07 15:09:21,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:09:21,373 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:09:21,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-10-07 15:09:21,453 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:09:21,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-07 15:09:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:22,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480888187] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:22,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:22,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-07 15:09:22,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962279272] [2021-10-07 15:09:22,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 15:09:22,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:22,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 15:09:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:09:22,017 INFO L87 Difference]: Start difference. First operand 73 states and 160 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) [2021-10-07 15:09:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:23,469 INFO L93 Difference]: Finished difference Result 118 states and 262 transitions. [2021-10-07 15:09:23,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:09:23,471 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 15 [2021-10-07 15:09:23,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:23,472 INFO L225 Difference]: With dead ends: 118 [2021-10-07 15:09:23,472 INFO L226 Difference]: Without dead ends: 118 [2021-10-07 15:09:23,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1604.6ms TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:09:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-07 15:09:23,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2021-10-07 15:09:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 100 states have (on average 2.32) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 232 transitions. [2021-10-07 15:09:23,476 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 232 transitions. Word has length 15 [2021-10-07 15:09:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:23,477 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 232 transitions. [2021-10-07 15:09:23,477 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) [2021-10-07 15:09:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 232 transitions. [2021-10-07 15:09:23,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:09:23,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:23,478 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:23,512 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 [2021-10-07 15:09:23,691 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,SelfDestructingSolverStorable24 [2021-10-07 15:09:23,692 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:23,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:23,692 INFO L82 PathProgramCache]: Analyzing trace with hash -547980813, now seen corresponding path program 7 times [2021-10-07 15:09:23,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:23,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653213564] [2021-10-07 15:09:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:23,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:24,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:24,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653213564] [2021-10-07 15:09:24,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653213564] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:24,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715084456] [2021-10-07 15:09:24,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:09:24,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:24,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:24,608 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) [2021-10-07 15:09:24,630 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 [2021-10-07 15:09:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:25,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-07 15:09:25,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:25,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-07 15:09:25,316 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:09:25,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:09:25,407 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:09:25,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:09:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:26,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715084456] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:26,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:26,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-07 15:09:26,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249249527] [2021-10-07 15:09:26,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 15:09:26,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:26,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 15:09:26,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:09:26,075 INFO L87 Difference]: Start difference. First operand 102 states and 232 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) [2021-10-07 15:09:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:27,273 INFO L93 Difference]: Finished difference Result 122 states and 262 transitions. [2021-10-07 15:09:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-07 15:09:27,273 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 15 [2021-10-07 15:09:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:27,275 INFO L225 Difference]: With dead ends: 122 [2021-10-07 15:09:27,275 INFO L226 Difference]: Without dead ends: 114 [2021-10-07 15:09:27,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1596.0ms TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:09:27,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-07 15:09:27,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 92. [2021-10-07 15:09:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 91 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:27,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 191 transitions. [2021-10-07 15:09:27,280 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 191 transitions. Word has length 15 [2021-10-07 15:09:27,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:27,280 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 191 transitions. [2021-10-07 15:09:27,280 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) [2021-10-07 15:09:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 191 transitions. [2021-10-07 15:09:27,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:09:27,281 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:27,281 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:27,321 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 [2021-10-07 15:09:27,495 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,SelfDestructingSolverStorable25 [2021-10-07 15:09:27,496 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash -549335824, now seen corresponding path program 9 times [2021-10-07 15:09:27,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:27,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711281299] [2021-10-07 15:09:27,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:27,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:28,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:28,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711281299] [2021-10-07 15:09:28,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711281299] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:28,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32572559] [2021-10-07 15:09:28,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:09:28,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:28,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:28,775 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) [2021-10-07 15:09:28,776 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 [2021-10-07 15:09:29,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:09:29,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:29,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 15:09:29,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:09:29,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32572559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:29,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:29,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2021-10-07 15:09:29,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786388320] [2021-10-07 15:09:29,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-07 15:09:29,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:29,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-07 15:09:29,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-10-07 15:09:29,704 INFO L87 Difference]: Start difference. First operand 92 states and 191 transitions. Second operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-10-07 15:09:30,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:30,920 INFO L93 Difference]: Finished difference Result 166 states and 358 transitions. [2021-10-07 15:09:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:09:30,921 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 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 15 [2021-10-07 15:09:30,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:30,922 INFO L225 Difference]: With dead ends: 166 [2021-10-07 15:09:30,922 INFO L226 Difference]: Without dead ends: 156 [2021-10-07 15:09:30,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1328.8ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:09:30,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-07 15:09:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 118. [2021-10-07 15:09:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 116 states have (on average 2.4310344827586206) internal successors, (282), 117 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 282 transitions. [2021-10-07 15:09:30,928 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 282 transitions. Word has length 15 [2021-10-07 15:09:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:30,929 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 282 transitions. [2021-10-07 15:09:30,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-10-07 15:09:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 282 transitions. [2021-10-07 15:09:30,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:09:30,930 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:30,930 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:30,962 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 [2021-10-07 15:09:31,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-07 15:09:31,146 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:31,147 INFO L82 PathProgramCache]: Analyzing trace with hash -549335823, now seen corresponding path program 8 times [2021-10-07 15:09:31,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:31,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760127553] [2021-10-07 15:09:31,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:31,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:31,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:31,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760127553] [2021-10-07 15:09:31,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760127553] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:31,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998598721] [2021-10-07 15:09:31,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:09:31,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:31,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:31,707 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) [2021-10-07 15:09:31,725 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 [2021-10-07 15:09:32,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:09:32,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:32,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-07 15:09:32,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:32,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:09:32,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 93 [2021-10-07 15:09:32,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-07 15:09:32,387 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-07 15:09:32,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-07 15:09:32,489 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-07 15:09:32,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-10-07 15:09:32,597 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-07 15:09:32,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-07 15:09:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:33,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998598721] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:33,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:33,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-07 15:09:33,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182835961] [2021-10-07 15:09:33,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 15:09:33,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:33,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 15:09:33,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:09:33,327 INFO L87 Difference]: Start difference. First operand 118 states and 282 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) [2021-10-07 15:09:36,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:36,417 INFO L93 Difference]: Finished difference Result 254 states and 610 transitions. [2021-10-07 15:09:36,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 15:09:36,418 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 15 [2021-10-07 15:09:36,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:36,422 INFO L225 Difference]: With dead ends: 254 [2021-10-07 15:09:36,422 INFO L226 Difference]: Without dead ends: 238 [2021-10-07 15:09:36,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2825.5ms TimeCoverageRelationStatistics Valid=256, Invalid=2396, Unknown=0, NotChecked=0, Total=2652 [2021-10-07 15:09:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-10-07 15:09:36,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 164. [2021-10-07 15:09:36,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 162 states have (on average 2.685185185185185) internal successors, (435), 163 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 435 transitions. [2021-10-07 15:09:36,431 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 435 transitions. Word has length 15 [2021-10-07 15:09:36,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:36,431 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 435 transitions. [2021-10-07 15:09:36,431 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) [2021-10-07 15:09:36,431 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 435 transitions. [2021-10-07 15:09:36,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:09:36,432 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:36,432 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:36,464 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 [2021-10-07 15:09:36,645 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,SelfDestructingSolverStorable27 [2021-10-07 15:09:36,646 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:36,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:36,646 INFO L82 PathProgramCache]: Analyzing trace with hash -591341134, now seen corresponding path program 10 times [2021-10-07 15:09:36,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:36,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70790620] [2021-10-07 15:09:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:36,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:37,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:37,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70790620] [2021-10-07 15:09:37,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70790620] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:37,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433120365] [2021-10-07 15:09:37,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:09:37,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:37,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:37,369 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) [2021-10-07 15:09:37,370 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 [2021-10-07 15:09:37,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:09:37,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:37,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-07 15:09:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:37,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:09:37,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-10-07 15:09:38,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:09:38,132 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:09:38,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-10-07 15:09:38,229 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:09:38,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-07 15:09:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:38,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433120365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:38,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:38,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-07 15:09:38,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935598457] [2021-10-07 15:09:38,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 15:09:38,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:38,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 15:09:38,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:09:38,860 INFO L87 Difference]: Start difference. First operand 164 states and 435 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) [2021-10-07 15:09:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:40,695 INFO L93 Difference]: Finished difference Result 300 states and 745 transitions. [2021-10-07 15:09:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 15:09:40,698 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 15 [2021-10-07 15:09:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:40,701 INFO L225 Difference]: With dead ends: 300 [2021-10-07 15:09:40,701 INFO L226 Difference]: Without dead ends: 300 [2021-10-07 15:09:40,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1664.3ms TimeCoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 15:09:40,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-10-07 15:09:40,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 198. [2021-10-07 15:09:40,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 196 states have (on average 2.826530612244898) internal successors, (554), 197 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:40,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 554 transitions. [2021-10-07 15:09:40,717 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 554 transitions. Word has length 15 [2021-10-07 15:09:40,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:40,717 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 554 transitions. [2021-10-07 15:09:40,717 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) [2021-10-07 15:09:40,717 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 554 transitions. [2021-10-07 15:09:40,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:09:40,719 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:40,719 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:40,744 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 [2021-10-07 15:09:40,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-07 15:09:40,923 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:40,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:40,924 INFO L82 PathProgramCache]: Analyzing trace with hash -591384843, now seen corresponding path program 9 times [2021-10-07 15:09:40,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:40,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989828160] [2021-10-07 15:09:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:40,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:41,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:41,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989828160] [2021-10-07 15:09:41,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989828160] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:41,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806669768] [2021-10-07 15:09:41,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:09:41,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:41,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:41,787 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) [2021-10-07 15:09:41,788 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 [2021-10-07 15:09:42,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:09:42,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:42,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-07 15:09:42,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:42,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-07 15:09:42,581 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-10-07 15:09:42,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 49 [2021-10-07 15:09:42,742 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:09:42,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2021-10-07 15:09:42,899 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:09:42,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-10-07 15:09:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:43,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806669768] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:43,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:43,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-07 15:09:43,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953403888] [2021-10-07 15:09:43,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 15:09:43,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:43,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 15:09:43,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:09:43,801 INFO L87 Difference]: Start difference. First operand 198 states and 554 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) [2021-10-07 15:09:46,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:46,522 INFO L93 Difference]: Finished difference Result 286 states and 756 transitions. [2021-10-07 15:09:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 15:09:46,527 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 15 [2021-10-07 15:09:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:46,529 INFO L225 Difference]: With dead ends: 286 [2021-10-07 15:09:46,530 INFO L226 Difference]: Without dead ends: 282 [2021-10-07 15:09:46,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 2980.5ms TimeCoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 15:09:46,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-10-07 15:09:46,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 210. [2021-10-07 15:09:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 208 states have (on average 2.8653846153846154) internal successors, (596), 209 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:46,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 596 transitions. [2021-10-07 15:09:46,540 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 596 transitions. Word has length 15 [2021-10-07 15:09:46,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:46,540 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 596 transitions. [2021-10-07 15:09:46,540 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) [2021-10-07 15:09:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 596 transitions. [2021-10-07 15:09:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:09:46,541 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:46,541 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:46,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:46,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:46,755 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:46,756 INFO L82 PathProgramCache]: Analyzing trace with hash -358924112, now seen corresponding path program 11 times [2021-10-07 15:09:46,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:46,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267277406] [2021-10-07 15:09:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:46,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:47,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:47,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267277406] [2021-10-07 15:09:47,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267277406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:47,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722561663] [2021-10-07 15:09:47,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:09:47,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:47,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:47,664 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) [2021-10-07 15:09:47,666 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 [2021-10-07 15:09:48,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:09:48,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:48,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 15:09:48,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:09:48,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722561663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:48,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:48,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 21 [2021-10-07 15:09:48,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481359587] [2021-10-07 15:09:48,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-07 15:09:48,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:48,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-07 15:09:48,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:09:48,754 INFO L87 Difference]: Start difference. First operand 210 states and 596 transitions. Second operand has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 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) [2021-10-07 15:09:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:50,045 INFO L93 Difference]: Finished difference Result 250 states and 692 transitions. [2021-10-07 15:09:50,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 15:09:50,046 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:09:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:50,048 INFO L225 Difference]: With dead ends: 250 [2021-10-07 15:09:50,049 INFO L226 Difference]: Without dead ends: 250 [2021-10-07 15:09:50,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1500.4ms TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:09:50,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-10-07 15:09:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 212. [2021-10-07 15:09:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 210 states have (on average 2.8523809523809525) internal successors, (599), 211 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:50,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 599 transitions. [2021-10-07 15:09:50,058 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 599 transitions. Word has length 16 [2021-10-07 15:09:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:50,058 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 599 transitions. [2021-10-07 15:09:50,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 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) [2021-10-07 15:09:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 599 transitions. [2021-10-07 15:09:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:09:50,059 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:50,059 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:50,098 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 [2021-10-07 15:09:50,273 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,SelfDestructingSolverStorable30 [2021-10-07 15:09:50,274 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:50,274 INFO L82 PathProgramCache]: Analyzing trace with hash -358924111, now seen corresponding path program 10 times [2021-10-07 15:09:50,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:50,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8682054] [2021-10-07 15:09:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:50,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:51,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:51,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8682054] [2021-10-07 15:09:51,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8682054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:51,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922688301] [2021-10-07 15:09:51,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:09:51,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:51,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:51,171 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) [2021-10-07 15:09:51,172 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 [2021-10-07 15:09:51,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:09:51,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:51,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 15:09:51,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:09:52,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922688301] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:52,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:52,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2021-10-07 15:09:52,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415866630] [2021-10-07 15:09:52,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 15:09:52,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:52,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 15:09:52,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:09:52,281 INFO L87 Difference]: Start difference. First operand 212 states and 599 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2021-10-07 15:09:53,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:53,248 INFO L93 Difference]: Finished difference Result 234 states and 654 transitions. [2021-10-07 15:09:53,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:09:53,249 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:09:53,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:53,257 INFO L225 Difference]: With dead ends: 234 [2021-10-07 15:09:53,257 INFO L226 Difference]: Without dead ends: 234 [2021-10-07 15:09:53,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1129.4ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 15:09:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-10-07 15:09:53,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 214. [2021-10-07 15:09:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 212 states have (on average 2.858490566037736) internal successors, (606), 213 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:53,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 606 transitions. [2021-10-07 15:09:53,266 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 606 transitions. Word has length 16 [2021-10-07 15:09:53,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:53,266 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 606 transitions. [2021-10-07 15:09:53,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2021-10-07 15:09:53,266 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 606 transitions. [2021-10-07 15:09:53,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:09:53,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:53,267 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:53,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:53,481 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,SelfDestructingSolverStorable31 [2021-10-07 15:09:53,482 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:53,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:53,482 INFO L82 PathProgramCache]: Analyzing trace with hash -360279121, now seen corresponding path program 11 times [2021-10-07 15:09:53,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:53,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028051318] [2021-10-07 15:09:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:53,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:55,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:55,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028051318] [2021-10-07 15:09:55,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028051318] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:55,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718610238] [2021-10-07 15:09:55,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:09:55,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:55,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:55,332 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) [2021-10-07 15:09:55,333 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 [2021-10-07 15:09:55,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:09:55,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:55,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 15:09:55,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:09:56,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718610238] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:56,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:56,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 23 [2021-10-07 15:09:56,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252593133] [2021-10-07 15:09:56,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-07 15:09:56,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:56,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-07 15:09:56,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:09:56,592 INFO L87 Difference]: Start difference. First operand 214 states and 606 transitions. Second operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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) [2021-10-07 15:09:59,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:59,223 INFO L93 Difference]: Finished difference Result 250 states and 662 transitions. [2021-10-07 15:09:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 15:09:59,224 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:09:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:59,226 INFO L225 Difference]: With dead ends: 250 [2021-10-07 15:09:59,226 INFO L226 Difference]: Without dead ends: 242 [2021-10-07 15:09:59,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2994.1ms TimeCoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 15:09:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-07 15:09:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 204. [2021-10-07 15:09:59,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 202 states have (on average 2.767326732673267) internal successors, (559), 203 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 559 transitions. [2021-10-07 15:09:59,234 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 559 transitions. Word has length 16 [2021-10-07 15:09:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:59,234 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 559 transitions. [2021-10-07 15:09:59,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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) [2021-10-07 15:09:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 559 transitions. [2021-10-07 15:09:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:09:59,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:59,235 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:59,270 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 [2021-10-07 15:09:59,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:59,449 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:09:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:59,449 INFO L82 PathProgramCache]: Analyzing trace with hash -402284432, now seen corresponding path program 12 times [2021-10-07 15:09:59,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:59,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914674206] [2021-10-07 15:09:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:59,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:00,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:00,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914674206] [2021-10-07 15:10:00,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914674206] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:00,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467333831] [2021-10-07 15:10:00,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:10:00,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:00,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:00,945 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) [2021-10-07 15:10:00,946 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 [2021-10-07 15:10:01,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:10:01,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:01,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-07 15:10:01,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:10:02,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467333831] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:02,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:02,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2021-10-07 15:10:02,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759869499] [2021-10-07 15:10:02,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 15:10:02,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:02,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 15:10:02,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:10:02,152 INFO L87 Difference]: Start difference. First operand 204 states and 559 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2021-10-07 15:10:04,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:04,197 INFO L93 Difference]: Finished difference Result 262 states and 680 transitions. [2021-10-07 15:10:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 15:10:04,203 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:10:04,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:04,205 INFO L225 Difference]: With dead ends: 262 [2021-10-07 15:10:04,205 INFO L226 Difference]: Without dead ends: 262 [2021-10-07 15:10:04,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2286.4ms TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 15:10:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-07 15:10:04,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 208. [2021-10-07 15:10:04,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 206 states have (on average 2.7815533980582523) internal successors, (573), 207 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 573 transitions. [2021-10-07 15:10:04,214 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 573 transitions. Word has length 16 [2021-10-07 15:10:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:04,214 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 573 transitions. [2021-10-07 15:10:04,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2021-10-07 15:10:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 573 transitions. [2021-10-07 15:10:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:10:04,215 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:04,215 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:04,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-07 15:10:04,428 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,SelfDestructingSolverStorable33 [2021-10-07 15:10:04,429 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:10:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:04,430 INFO L82 PathProgramCache]: Analyzing trace with hash -402328141, now seen corresponding path program 12 times [2021-10-07 15:10:04,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:04,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046088397] [2021-10-07 15:10:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:04,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:05,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:05,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046088397] [2021-10-07 15:10:05,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046088397] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:05,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852774038] [2021-10-07 15:10:05,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:10:05,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:05,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:05,644 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) [2021-10-07 15:10:05,645 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 [2021-10-07 15:10:06,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:10:06,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:06,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-07 15:10:06,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:10:06,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852774038] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:06,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:06,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2021-10-07 15:10:06,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999402866] [2021-10-07 15:10:06,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 15:10:06,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:06,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 15:10:06,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:10:06,942 INFO L87 Difference]: Start difference. First operand 208 states and 573 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2021-10-07 15:10:09,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:09,030 INFO L93 Difference]: Finished difference Result 244 states and 645 transitions. [2021-10-07 15:10:09,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 15:10:09,030 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:10:09,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:09,033 INFO L225 Difference]: With dead ends: 244 [2021-10-07 15:10:09,033 INFO L226 Difference]: Without dead ends: 236 [2021-10-07 15:10:09,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2428.4ms TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 15:10:09,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-07 15:10:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-10-07 15:10:09,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 206 states have (on average 2.7718446601941746) internal successors, (571), 207 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:09,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 571 transitions. [2021-10-07 15:10:09,041 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 571 transitions. Word has length 16 [2021-10-07 15:10:09,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:09,041 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 571 transitions. [2021-10-07 15:10:09,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2021-10-07 15:10:09,042 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 571 transitions. [2021-10-07 15:10:09,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:10:09,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:09,042 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:09,076 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 [2021-10-07 15:10:09,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:09,257 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:10:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:09,257 INFO L82 PathProgramCache]: Analyzing trace with hash 150459233, now seen corresponding path program 13 times [2021-10-07 15:10:09,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:09,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30472311] [2021-10-07 15:10:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:09,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:09,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:09,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30472311] [2021-10-07 15:10:09,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30472311] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:09,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275926980] [2021-10-07 15:10:09,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:10:09,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:09,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:09,363 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) [2021-10-07 15:10:09,377 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 [2021-10-07 15:10:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:10,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 15:10:10,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:10,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275926980] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:10,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:10,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-07 15:10:10,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354033428] [2021-10-07 15:10:10,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:10:10,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:10,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:10:10,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:10:10,288 INFO L87 Difference]: Start difference. First operand 208 states and 571 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) [2021-10-07 15:10:10,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:10,433 INFO L93 Difference]: Finished difference Result 192 states and 395 transitions. [2021-10-07 15:10:10,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:10:10,434 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:10:10,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:10,435 INFO L225 Difference]: With dead ends: 192 [2021-10-07 15:10:10,435 INFO L226 Difference]: Without dead ends: 122 [2021-10-07 15:10:10,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:10:10,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-07 15:10:10,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2021-10-07 15:10:10,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 114 states have (on average 2.1491228070175437) internal successors, (245), 115 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 245 transitions. [2021-10-07 15:10:10,439 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 245 transitions. Word has length 16 [2021-10-07 15:10:10,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:10,439 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 245 transitions. [2021-10-07 15:10:10,440 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) [2021-10-07 15:10:10,440 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 245 transitions. [2021-10-07 15:10:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:10:10,440 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:10,440 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:10,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-07 15:10:10,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:10,647 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:10:10,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:10,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1163506035, now seen corresponding path program 13 times [2021-10-07 15:10:10,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:10,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931089161] [2021-10-07 15:10:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:10,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:13,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:13,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931089161] [2021-10-07 15:10:13,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931089161] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:13,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294312634] [2021-10-07 15:10:13,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:10:13,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:13,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:13,095 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) [2021-10-07 15:10:13,096 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 [2021-10-07 15:10:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:13,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-07 15:10:13,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:10:14,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294312634] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:14,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:14,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2021-10-07 15:10:14,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524853097] [2021-10-07 15:10:14,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:10:14,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:14,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:10:14,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:10:14,527 INFO L87 Difference]: Start difference. First operand 116 states and 245 transitions. Second operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 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) [2021-10-07 15:10:18,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:18,789 INFO L93 Difference]: Finished difference Result 158 states and 331 transitions. [2021-10-07 15:10:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:10:18,790 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:10:18,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:18,791 INFO L225 Difference]: With dead ends: 158 [2021-10-07 15:10:18,791 INFO L226 Difference]: Without dead ends: 158 [2021-10-07 15:10:18,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 4884.5ms TimeCoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 15:10:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-07 15:10:18,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 86. [2021-10-07 15:10:18,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 85 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:18,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 175 transitions. [2021-10-07 15:10:18,797 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 175 transitions. Word has length 17 [2021-10-07 15:10:18,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:18,797 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 175 transitions. [2021-10-07 15:10:18,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 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) [2021-10-07 15:10:18,797 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 175 transitions. [2021-10-07 15:10:18,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:10:18,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:18,798 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:18,825 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 [2021-10-07 15:10:18,998 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,SelfDestructingSolverStorable36 [2021-10-07 15:10:18,999 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:10:19,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:19,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1758255009, now seen corresponding path program 14 times [2021-10-07 15:10:19,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:19,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425246042] [2021-10-07 15:10:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:19,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:10:19,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:19,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425246042] [2021-10-07 15:10:19,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425246042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:19,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301662784] [2021-10-07 15:10:19,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:10:19,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:19,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:19,098 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) [2021-10-07 15:10:19,121 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 [2021-10-07 15:10:19,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:10:19,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:19,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 15:10:19,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:19,883 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-10-07 15:10:19,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 12 [2021-10-07 15:10:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:10:19,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301662784] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:19,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:19,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-10-07 15:10:19,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007453219] [2021-10-07 15:10:19,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:10:19,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:19,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:10:19,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:10:19,950 INFO L87 Difference]: Start difference. First operand 86 states and 175 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2021-10-07 15:10:20,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:20,153 INFO L93 Difference]: Finished difference Result 206 states and 471 transitions. [2021-10-07 15:10:20,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:10:20,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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 [2021-10-07 15:10:20,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:20,155 INFO L225 Difference]: With dead ends: 206 [2021-10-07 15:10:20,155 INFO L226 Difference]: Without dead ends: 194 [2021-10-07 15:10:20,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:10:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-10-07 15:10:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 124. [2021-10-07 15:10:20,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 2.459016393442623) internal successors, (300), 123 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:20,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 300 transitions. [2021-10-07 15:10:20,163 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 300 transitions. Word has length 17 [2021-10-07 15:10:20,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:20,163 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 300 transitions. [2021-10-07 15:10:20,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2021-10-07 15:10:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 300 transitions. [2021-10-07 15:10:20,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:10:20,164 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:20,164 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:20,206 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 [2021-10-07 15:10:20,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-07 15:10:20,379 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:10:20,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:20,380 INFO L82 PathProgramCache]: Analyzing trace with hash 412731536, now seen corresponding path program 15 times [2021-10-07 15:10:20,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:20,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723408381] [2021-10-07 15:10:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:20,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:21,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:21,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723408381] [2021-10-07 15:10:21,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723408381] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:21,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418769156] [2021-10-07 15:10:21,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:10:21,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:21,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:21,162 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) [2021-10-07 15:10:21,163 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 [2021-10-07 15:10:22,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:10:22,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:22,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-07 15:10:22,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:22,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418769156] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:22,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:22,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2021-10-07 15:10:22,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394677719] [2021-10-07 15:10:22,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-07 15:10:22,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:22,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-07 15:10:22,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:10:22,952 INFO L87 Difference]: Start difference. First operand 124 states and 300 transitions. Second operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 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) [2021-10-07 15:10:24,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:24,283 INFO L93 Difference]: Finished difference Result 230 states and 562 transitions. [2021-10-07 15:10:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 15:10:24,284 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:10:24,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:24,285 INFO L225 Difference]: With dead ends: 230 [2021-10-07 15:10:24,285 INFO L226 Difference]: Without dead ends: 230 [2021-10-07 15:10:24,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1620.9ms TimeCoverageRelationStatistics Valid=229, Invalid=1663, Unknown=0, NotChecked=0, Total=1892 [2021-10-07 15:10:24,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-07 15:10:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 168. [2021-10-07 15:10:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 166 states have (on average 2.5843373493975905) internal successors, (429), 167 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 429 transitions. [2021-10-07 15:10:24,291 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 429 transitions. Word has length 17 [2021-10-07 15:10:24,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:24,292 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 429 transitions. [2021-10-07 15:10:24,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 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) [2021-10-07 15:10:24,292 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 429 transitions. [2021-10-07 15:10:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:10:24,293 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:24,293 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:24,325 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 [2021-10-07 15:10:24,507 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,SelfDestructingSolverStorable38 [2021-10-07 15:10:24,508 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:10:24,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:24,508 INFO L82 PathProgramCache]: Analyzing trace with hash 327310834, now seen corresponding path program 16 times [2021-10-07 15:10:24,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:24,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219482301] [2021-10-07 15:10:24,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:24,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:24,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:24,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219482301] [2021-10-07 15:10:24,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219482301] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:24,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488363003] [2021-10-07 15:10:24,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:10:24,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:24,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:24,738 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) [2021-10-07 15:10:24,742 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 [2021-10-07 15:10:25,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:10:25,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:25,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 15:10:25,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:25,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488363003] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:25,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:25,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-07 15:10:25,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088014369] [2021-10-07 15:10:25,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 15:10:25,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:25,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 15:10:25,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:10:25,936 INFO L87 Difference]: Start difference. First operand 168 states and 429 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 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) [2021-10-07 15:10:26,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:26,395 INFO L93 Difference]: Finished difference Result 162 states and 414 transitions. [2021-10-07 15:10:26,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:10:26,396 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 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 17 [2021-10-07 15:10:26,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:26,397 INFO L225 Difference]: With dead ends: 162 [2021-10-07 15:10:26,398 INFO L226 Difference]: Without dead ends: 145 [2021-10-07 15:10:26,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 618.0ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:10:26,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-07 15:10:26,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-07 15:10:26,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 143 states have (on average 2.734265734265734) internal successors, (391), 144 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 391 transitions. [2021-10-07 15:10:26,403 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 391 transitions. Word has length 17 [2021-10-07 15:10:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:26,403 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 391 transitions. [2021-10-07 15:10:26,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 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) [2021-10-07 15:10:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 391 transitions. [2021-10-07 15:10:26,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:10:26,404 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:26,404 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:26,431 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 [2021-10-07 15:10:26,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-07 15:10:26,609 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:10:26,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:26,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1707595726, now seen corresponding path program 17 times [2021-10-07 15:10:26,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:26,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585549278] [2021-10-07 15:10:26,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:26,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:28,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:28,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585549278] [2021-10-07 15:10:28,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585549278] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:28,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206465738] [2021-10-07 15:10:28,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:10:28,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:28,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:28,930 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) [2021-10-07 15:10:28,947 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 [2021-10-07 15:10:29,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:10:29,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:29,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-07 15:10:29,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:29,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:10:29,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-10-07 15:10:29,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-10-07 15:10:30,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:10:30,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-07 15:10:30,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:10:30,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-07 15:10:30,241 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:10:30,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-10-07 15:10:30,344 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:10:30,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-07 15:10:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:31,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206465738] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:31,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:31,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-07 15:10:31,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083115644] [2021-10-07 15:10:31,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:10:31,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:31,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:10:31,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:10:31,187 INFO L87 Difference]: Start difference. First operand 145 states and 391 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-10-07 15:10:33,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:33,689 INFO L93 Difference]: Finished difference Result 363 states and 971 transitions. [2021-10-07 15:10:33,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 15:10:33,689 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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 18 [2021-10-07 15:10:33,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:33,692 INFO L225 Difference]: With dead ends: 363 [2021-10-07 15:10:33,692 INFO L226 Difference]: Without dead ends: 363 [2021-10-07 15:10:33,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2903.6ms TimeCoverageRelationStatistics Valid=229, Invalid=2321, Unknown=0, NotChecked=0, Total=2550 [2021-10-07 15:10:33,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-10-07 15:10:33,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 184. [2021-10-07 15:10:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 182 states have (on average 3.076923076923077) internal successors, (560), 183 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 560 transitions. [2021-10-07 15:10:33,701 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 560 transitions. Word has length 18 [2021-10-07 15:10:33,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:33,701 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 560 transitions. [2021-10-07 15:10:33,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-10-07 15:10:33,701 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 560 transitions. [2021-10-07 15:10:33,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:10:33,702 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:33,702 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:33,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-07 15:10:33,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:33,907 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:10:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:33,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1285263489, now seen corresponding path program 18 times [2021-10-07 15:10:33,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:33,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941980402] [2021-10-07 15:10:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:33,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:34,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:34,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941980402] [2021-10-07 15:10:34,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941980402] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:34,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42479947] [2021-10-07 15:10:34,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:10:34,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:34,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:34,477 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) [2021-10-07 15:10:34,478 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 [2021-10-07 15:10:35,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:10:35,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:35,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-07 15:10:35,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:35,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:10:35,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:10:35,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:10:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:36,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42479947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:36,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:36,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 28 [2021-10-07 15:10:36,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686283881] [2021-10-07 15:10:36,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:10:36,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:36,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:10:36,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:10:36,478 INFO L87 Difference]: Start difference. First operand 184 states and 560 transitions. Second operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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) [2021-10-07 15:10:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:39,120 INFO L93 Difference]: Finished difference Result 415 states and 1109 transitions. [2021-10-07 15:10:39,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 15:10:39,121 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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 18 [2021-10-07 15:10:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:39,124 INFO L225 Difference]: With dead ends: 415 [2021-10-07 15:10:39,124 INFO L226 Difference]: Without dead ends: 415 [2021-10-07 15:10:39,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2461.8ms TimeCoverageRelationStatistics Valid=223, Invalid=2327, Unknown=0, NotChecked=0, Total=2550 [2021-10-07 15:10:39,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-10-07 15:10:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 299. [2021-10-07 15:10:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 297 states have (on average 3.0942760942760943) internal successors, (919), 298 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 919 transitions. [2021-10-07 15:10:39,136 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 919 transitions. Word has length 18 [2021-10-07 15:10:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:39,136 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 919 transitions. [2021-10-07 15:10:39,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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) [2021-10-07 15:10:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 919 transitions. [2021-10-07 15:10:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:10:39,138 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:39,138 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:39,172 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 [2021-10-07 15:10:39,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:39,352 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:10:39,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:39,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1285263488, now seen corresponding path program 14 times [2021-10-07 15:10:39,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:39,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912356289] [2021-10-07 15:10:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:39,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:40,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:40,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912356289] [2021-10-07 15:10:40,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912356289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:40,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731758622] [2021-10-07 15:10:40,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:10:40,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:40,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:40,036 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) [2021-10-07 15:10:40,057 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 [2021-10-07 15:10:40,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:10:40,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:40,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-07 15:10:40,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:40,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:10:40,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2021-10-07 15:10:41,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-07 15:10:41,252 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:10:41,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:10:41,348 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:10:41,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-10-07 15:10:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:42,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731758622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:42,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:42,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 15:10:42,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210946810] [2021-10-07 15:10:42,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 15:10:42,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:42,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 15:10:42,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:10:42,248 INFO L87 Difference]: Start difference. First operand 299 states and 919 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) [2021-10-07 15:10:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:44,777 INFO L93 Difference]: Finished difference Result 443 states and 1243 transitions. [2021-10-07 15:10:44,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:10:44,778 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 18 [2021-10-07 15:10:44,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:44,781 INFO L225 Difference]: With dead ends: 443 [2021-10-07 15:10:44,781 INFO L226 Difference]: Without dead ends: 431 [2021-10-07 15:10:44,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2241.6ms TimeCoverageRelationStatistics Valid=268, Invalid=2384, Unknown=0, NotChecked=0, Total=2652 [2021-10-07 15:10:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-10-07 15:10:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 341. [2021-10-07 15:10:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 339 states have (on average 3.1091445427728615) internal successors, (1054), 340 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1054 transitions. [2021-10-07 15:10:44,793 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1054 transitions. Word has length 18 [2021-10-07 15:10:44,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:44,793 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1054 transitions. [2021-10-07 15:10:44,793 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) [2021-10-07 15:10:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1054 transitions. [2021-10-07 15:10:44,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:10:44,794 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:44,795 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:44,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-07 15:10:45,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:45,009 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:10:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1327268799, now seen corresponding path program 19 times [2021-10-07 15:10:45,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:45,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953248631] [2021-10-07 15:10:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:45,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:45,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:45,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953248631] [2021-10-07 15:10:45,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953248631] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:45,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825699276] [2021-10-07 15:10:45,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:10:45,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:45,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:45,639 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) [2021-10-07 15:10:45,658 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 [2021-10-07 15:10:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:46,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-07 15:10:46,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:47,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825699276] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:47,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:47,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 29 [2021-10-07 15:10:47,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771183945] [2021-10-07 15:10:47,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:10:47,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:47,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:10:47,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:10:47,671 INFO L87 Difference]: Start difference. First operand 341 states and 1054 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-10-07 15:10:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:50,841 INFO L93 Difference]: Finished difference Result 1037 states and 3154 transitions. [2021-10-07 15:10:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-07 15:10:50,842 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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 18 [2021-10-07 15:10:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:50,850 INFO L225 Difference]: With dead ends: 1037 [2021-10-07 15:10:50,850 INFO L226 Difference]: Without dead ends: 1037 [2021-10-07 15:10:50,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 2356.7ms TimeCoverageRelationStatistics Valid=307, Invalid=3353, Unknown=0, NotChecked=0, Total=3660 [2021-10-07 15:10:50,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-10-07 15:10:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 575. [2021-10-07 15:10:50,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 573 states have (on average 3.6387434554973823) internal successors, (2085), 574 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:50,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 2085 transitions. [2021-10-07 15:10:50,883 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 2085 transitions. Word has length 18 [2021-10-07 15:10:50,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:50,883 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 2085 transitions. [2021-10-07 15:10:50,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-10-07 15:10:50,883 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 2085 transitions. [2021-10-07 15:10:50,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:10:50,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:50,884 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:50,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-07 15:10:51,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:51,099 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:10:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:51,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1327268798, now seen corresponding path program 15 times [2021-10-07 15:10:51,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:51,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618547997] [2021-10-07 15:10:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:51,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:52,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:52,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618547997] [2021-10-07 15:10:52,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618547997] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:52,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365551823] [2021-10-07 15:10:52,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:10:52,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:52,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:52,421 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) [2021-10-07 15:10:52,423 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 [2021-10-07 15:10:53,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:10:53,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:53,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-07 15:10:53,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:53,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:10:53,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 226 [2021-10-07 15:10:53,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:10:54,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:10:54,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-07 15:10:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:10:54,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365551823] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:54,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:54,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-07 15:10:54,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394827310] [2021-10-07 15:10:54,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:10:54,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:54,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:10:54,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:10:54,895 INFO L87 Difference]: Start difference. First operand 575 states and 2085 transitions. Second operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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) [2021-10-07 15:10:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:57,550 INFO L93 Difference]: Finished difference Result 893 states and 2612 transitions. [2021-10-07 15:10:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:10:57,550 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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 18 [2021-10-07 15:10:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:57,554 INFO L225 Difference]: With dead ends: 893 [2021-10-07 15:10:57,554 INFO L226 Difference]: Without dead ends: 811 [2021-10-07 15:10:57,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 3001.9ms TimeCoverageRelationStatistics Valid=262, Invalid=2090, Unknown=0, NotChecked=0, Total=2352 [2021-10-07 15:10:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-10-07 15:10:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 541. [2021-10-07 15:10:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 539 states have (on average 3.031539888682746) internal successors, (1634), 540 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1634 transitions. [2021-10-07 15:10:57,573 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1634 transitions. Word has length 18 [2021-10-07 15:10:57,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:57,573 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1634 transitions. [2021-10-07 15:10:57,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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) [2021-10-07 15:10:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1634 transitions. [2021-10-07 15:10:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:10:57,574 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:57,575 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:57,613 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 [2021-10-07 15:10:57,788 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,SelfDestructingSolverStorable44 [2021-10-07 15:10:57,789 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:10:57,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:57,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1328623809, now seen corresponding path program 20 times [2021-10-07 15:10:57,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:57,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055618743] [2021-10-07 15:10:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:57,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:58,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:58,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055618743] [2021-10-07 15:10:58,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055618743] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:58,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156228382] [2021-10-07 15:10:58,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:10:58,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:58,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:58,273 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) [2021-10-07 15:10:58,274 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 [2021-10-07 15:10:59,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:10:59,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:59,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-07 15:10:59,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:59,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:10:59,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:10:59,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:00,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156228382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:00,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:00,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-07 15:11:00,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779731122] [2021-10-07 15:11:00,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:11:00,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:00,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:11:00,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:11:00,493 INFO L87 Difference]: Start difference. First operand 541 states and 1634 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-10-07 15:11:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:01,109 INFO L93 Difference]: Finished difference Result 475 states and 1355 transitions. [2021-10-07 15:11:01,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:11:01,114 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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 18 [2021-10-07 15:11:01,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:01,118 INFO L225 Difference]: With dead ends: 475 [2021-10-07 15:11:01,118 INFO L226 Difference]: Without dead ends: 473 [2021-10-07 15:11:01,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 988.2ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 15:11:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-10-07 15:11:01,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 461. [2021-10-07 15:11:01,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 459 states have (on average 2.893246187363834) internal successors, (1328), 460 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1328 transitions. [2021-10-07 15:11:01,131 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1328 transitions. Word has length 18 [2021-10-07 15:11:01,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:01,132 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1328 transitions. [2021-10-07 15:11:01,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-10-07 15:11:01,132 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1328 transitions. [2021-10-07 15:11:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:11:01,133 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:01,133 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:01,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-07 15:11:01,346 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,SelfDestructingSolverStorable45 [2021-10-07 15:11:01,347 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:11:01,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:01,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1328623808, now seen corresponding path program 16 times [2021-10-07 15:11:01,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:01,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755224944] [2021-10-07 15:11:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:01,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:02,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:02,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755224944] [2021-10-07 15:11:02,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755224944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:02,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351104013] [2021-10-07 15:11:02,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:11:02,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:02,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:02,423 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) [2021-10-07 15:11:02,425 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 [2021-10-07 15:11:03,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:11:03,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:03,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-07 15:11:03,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:03,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-07 15:11:03,812 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-07 15:11:03,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-07 15:11:03,924 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-07 15:11:03,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-07 15:11:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:05,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351104013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:05,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:05,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 15:11:05,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724236635] [2021-10-07 15:11:05,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 15:11:05,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:05,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 15:11:05,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:11:05,263 INFO L87 Difference]: Start difference. First operand 461 states and 1328 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) [2021-10-07 15:11:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:08,145 INFO L93 Difference]: Finished difference Result 495 states and 1365 transitions. [2021-10-07 15:11:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 15:11:08,145 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 18 [2021-10-07 15:11:08,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:08,148 INFO L225 Difference]: With dead ends: 495 [2021-10-07 15:11:08,149 INFO L226 Difference]: Without dead ends: 483 [2021-10-07 15:11:08,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 3408.7ms TimeCoverageRelationStatistics Valid=339, Invalid=2631, Unknown=0, NotChecked=0, Total=2970 [2021-10-07 15:11:08,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-10-07 15:11:08,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 439. [2021-10-07 15:11:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 437 states have (on average 2.871853546910755) internal successors, (1255), 438 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1255 transitions. [2021-10-07 15:11:08,160 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1255 transitions. Word has length 18 [2021-10-07 15:11:08,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:08,161 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1255 transitions. [2021-10-07 15:11:08,161 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) [2021-10-07 15:11:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1255 transitions. [2021-10-07 15:11:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:11:08,162 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:08,162 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:08,201 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 [2021-10-07 15:11:08,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:08,378 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:11:08,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:08,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1328667519, now seen corresponding path program 21 times [2021-10-07 15:11:08,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:08,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933207042] [2021-10-07 15:11:08,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:08,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:09,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:09,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933207042] [2021-10-07 15:11:09,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933207042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:09,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609327787] [2021-10-07 15:11:09,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:11:09,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:09,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:09,131 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) [2021-10-07 15:11:09,132 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 [2021-10-07 15:11:10,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:11:10,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:10,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-07 15:11:10,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:11,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609327787] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:11,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:11,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-07 15:11:11,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020291670] [2021-10-07 15:11:11,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:11:11,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:11,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:11:11,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:11:11,593 INFO L87 Difference]: Start difference. First operand 439 states and 1255 transitions. Second operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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) [2021-10-07 15:11:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:13,451 INFO L93 Difference]: Finished difference Result 647 states and 1739 transitions. [2021-10-07 15:11:13,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 15:11:13,451 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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 18 [2021-10-07 15:11:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:13,454 INFO L225 Difference]: With dead ends: 647 [2021-10-07 15:11:13,455 INFO L226 Difference]: Without dead ends: 555 [2021-10-07 15:11:13,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2260.4ms TimeCoverageRelationStatistics Valid=269, Invalid=1801, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 15:11:13,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-10-07 15:11:13,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 417. [2021-10-07 15:11:13,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 415 states have (on average 2.910843373493976) internal successors, (1208), 416 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1208 transitions. [2021-10-07 15:11:13,468 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1208 transitions. Word has length 18 [2021-10-07 15:11:13,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:13,469 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1208 transitions. [2021-10-07 15:11:13,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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) [2021-10-07 15:11:13,469 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1208 transitions. [2021-10-07 15:11:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:11:13,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:13,470 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:13,511 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 [2021-10-07 15:11:13,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-07 15:11:13,687 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:11:13,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:13,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1665533887, now seen corresponding path program 22 times [2021-10-07 15:11:13,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:13,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466888038] [2021-10-07 15:11:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:13,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:14,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:14,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466888038] [2021-10-07 15:11:14,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466888038] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:14,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152384858] [2021-10-07 15:11:14,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:11:14,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:14,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:14,161 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) [2021-10-07 15:11:14,181 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 [2021-10-07 15:11:15,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:11:15,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-07 15:11:15,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:16,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152384858] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:16,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:16,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-07 15:11:16,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543362436] [2021-10-07 15:11:16,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:11:16,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:16,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:11:16,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:11:16,276 INFO L87 Difference]: Start difference. First operand 417 states and 1208 transitions. Second operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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) [2021-10-07 15:11:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:18,607 INFO L93 Difference]: Finished difference Result 713 states and 1840 transitions. [2021-10-07 15:11:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-07 15:11:18,608 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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 18 [2021-10-07 15:11:18,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:18,612 INFO L225 Difference]: With dead ends: 713 [2021-10-07 15:11:18,612 INFO L226 Difference]: Without dead ends: 675 [2021-10-07 15:11:18,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 2120.8ms TimeCoverageRelationStatistics Valid=353, Invalid=3187, Unknown=0, NotChecked=0, Total=3540 [2021-10-07 15:11:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-10-07 15:11:18,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 491. [2021-10-07 15:11:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 489 states have (on average 2.938650306748466) internal successors, (1437), 490 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1437 transitions. [2021-10-07 15:11:18,627 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1437 transitions. Word has length 18 [2021-10-07 15:11:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:18,628 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1437 transitions. [2021-10-07 15:11:18,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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) [2021-10-07 15:11:18,628 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1437 transitions. [2021-10-07 15:11:18,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:11:18,629 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:18,629 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:18,672 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 [2021-10-07 15:11:18,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:18,843 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:11:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:18,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1664178877, now seen corresponding path program 23 times [2021-10-07 15:11:18,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:18,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950975744] [2021-10-07 15:11:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:18,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:20,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:20,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950975744] [2021-10-07 15:11:20,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950975744] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:20,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133552040] [2021-10-07 15:11:20,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:11:20,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:20,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:20,053 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) [2021-10-07 15:11:20,053 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 [2021-10-07 15:11:21,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:11:21,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:21,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-07 15:11:21,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:22,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133552040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:22,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:22,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 29 [2021-10-07 15:11:22,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242249005] [2021-10-07 15:11:22,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:11:22,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:22,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:11:22,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:11:22,325 INFO L87 Difference]: Start difference. First operand 491 states and 1437 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-10-07 15:11:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:25,770 INFO L93 Difference]: Finished difference Result 729 states and 1914 transitions. [2021-10-07 15:11:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-07 15:11:25,771 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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 18 [2021-10-07 15:11:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:25,776 INFO L225 Difference]: With dead ends: 729 [2021-10-07 15:11:25,776 INFO L226 Difference]: Without dead ends: 703 [2021-10-07 15:11:25,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 3239.0ms TimeCoverageRelationStatistics Valid=286, Invalid=3020, Unknown=0, NotChecked=0, Total=3306 [2021-10-07 15:11:25,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-10-07 15:11:25,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 525. [2021-10-07 15:11:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 523 states have (on average 2.891013384321224) internal successors, (1512), 524 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:25,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1512 transitions. [2021-10-07 15:11:25,791 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1512 transitions. Word has length 18 [2021-10-07 15:11:25,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:25,792 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1512 transitions. [2021-10-07 15:11:25,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-10-07 15:11:25,792 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1512 transitions. [2021-10-07 15:11:25,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:11:25,793 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:25,793 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:25,834 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 [2021-10-07 15:11:26,007 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,SelfDestructingSolverStorable49 [2021-10-07 15:11:26,008 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:11:26,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:26,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1664135167, now seen corresponding path program 24 times [2021-10-07 15:11:26,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:26,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807195278] [2021-10-07 15:11:26,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:26,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:26,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:26,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807195278] [2021-10-07 15:11:26,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807195278] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:26,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134559341] [2021-10-07 15:11:26,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:11:26,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:26,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:26,598 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) [2021-10-07 15:11:26,599 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 [2021-10-07 15:11:27,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:11:27,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:27,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-07 15:11:27,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:28,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134559341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:28,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:28,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-07 15:11:28,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345625313] [2021-10-07 15:11:28,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:11:28,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:28,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:11:28,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:11:28,932 INFO L87 Difference]: Start difference. First operand 525 states and 1512 transitions. Second operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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) [2021-10-07 15:11:35,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:35,284 INFO L93 Difference]: Finished difference Result 467 states and 1235 transitions. [2021-10-07 15:11:35,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 15:11:35,285 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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 18 [2021-10-07 15:11:35,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:35,288 INFO L225 Difference]: With dead ends: 467 [2021-10-07 15:11:35,288 INFO L226 Difference]: Without dead ends: 415 [2021-10-07 15:11:35,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 5406.1ms TimeCoverageRelationStatistics Valid=364, Invalid=3417, Unknown=1, NotChecked=0, Total=3782 [2021-10-07 15:11:35,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-10-07 15:11:35,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 401. [2021-10-07 15:11:35,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 399 states have (on average 2.857142857142857) internal successors, (1140), 400 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1140 transitions. [2021-10-07 15:11:35,297 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1140 transitions. Word has length 18 [2021-10-07 15:11:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:35,297 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1140 transitions. [2021-10-07 15:11:35,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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) [2021-10-07 15:11:35,297 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1140 transitions. [2021-10-07 15:11:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:11:35,298 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:35,298 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:35,331 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 [2021-10-07 15:11:35,512 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,SelfDestructingSolverStorable50 [2021-10-07 15:11:35,513 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:11:35,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:35,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1622175025, now seen corresponding path program 17 times [2021-10-07 15:11:35,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:35,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052725846] [2021-10-07 15:11:35,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:35,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:11:35,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:35,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052725846] [2021-10-07 15:11:35,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052725846] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:35,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132801904] [2021-10-07 15:11:35,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:11:35,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:35,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:35,657 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) [2021-10-07 15:11:35,658 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 [2021-10-07 15:11:36,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:11:36,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:36,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-07 15:11:36,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:37,428 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-10-07 15:11:37,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 17 [2021-10-07 15:11:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:37,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132801904] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:37,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:37,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 24 [2021-10-07 15:11:37,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597616881] [2021-10-07 15:11:37,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-07 15:11:37,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-07 15:11:37,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:11:37,468 INFO L87 Difference]: Start difference. First operand 401 states and 1140 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-10-07 15:11:38,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:38,315 INFO L93 Difference]: Finished difference Result 285 states and 736 transitions. [2021-10-07 15:11:38,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:11:38,315 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 18 [2021-10-07 15:11:38,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:38,317 INFO L225 Difference]: With dead ends: 285 [2021-10-07 15:11:38,317 INFO L226 Difference]: Without dead ends: 251 [2021-10-07 15:11:38,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 861.1ms TimeCoverageRelationStatistics Valid=282, Invalid=1440, Unknown=0, NotChecked=0, Total=1722 [2021-10-07 15:11:38,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-07 15:11:38,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 237. [2021-10-07 15:11:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 235 states have (on average 2.782978723404255) internal successors, (654), 236 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 654 transitions. [2021-10-07 15:11:38,324 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 654 transitions. Word has length 18 [2021-10-07 15:11:38,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:38,324 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 654 transitions. [2021-10-07 15:11:38,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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) [2021-10-07 15:11:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 654 transitions. [2021-10-07 15:11:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:11:38,325 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:38,325 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:38,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-10-07 15:11:38,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:38,540 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:11:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:38,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1622129858, now seen corresponding path program 18 times [2021-10-07 15:11:38,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:38,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429569802] [2021-10-07 15:11:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:38,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:39,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:39,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429569802] [2021-10-07 15:11:39,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429569802] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:39,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255695516] [2021-10-07 15:11:39,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:11:39,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:39,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:39,137 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) [2021-10-07 15:11:39,138 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 [2021-10-07 15:11:40,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:11:40,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:40,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-07 15:11:40,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:40,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:11:40,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:40,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:41,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255695516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:41,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:41,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-07 15:11:41,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170094556] [2021-10-07 15:11:41,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:11:41,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:41,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:11:41,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:11:41,987 INFO L87 Difference]: Start difference. First operand 237 states and 654 transitions. Second operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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) [2021-10-07 15:11:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:43,086 INFO L93 Difference]: Finished difference Result 247 states and 667 transitions. [2021-10-07 15:11:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 15:11:43,087 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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 18 [2021-10-07 15:11:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:43,088 INFO L225 Difference]: With dead ends: 247 [2021-10-07 15:11:43,088 INFO L226 Difference]: Without dead ends: 233 [2021-10-07 15:11:43,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1443.5ms TimeCoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 15:11:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-10-07 15:11:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2021-10-07 15:11:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 219 states have (on average 2.858447488584475) internal successors, (626), 220 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 626 transitions. [2021-10-07 15:11:43,092 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 626 transitions. Word has length 18 [2021-10-07 15:11:43,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:43,092 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 626 transitions. [2021-10-07 15:11:43,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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) [2021-10-07 15:11:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 626 transitions. [2021-10-07 15:11:43,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:11:43,093 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:43,093 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:43,121 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 [2021-10-07 15:11:43,293 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,SelfDestructingSolverStorable52 [2021-10-07 15:11:43,294 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:11:43,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:43,295 INFO L82 PathProgramCache]: Analyzing trace with hash -46863359, now seen corresponding path program 25 times [2021-10-07 15:11:43,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:43,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941223719] [2021-10-07 15:11:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:43,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:43,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:43,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941223719] [2021-10-07 15:11:43,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941223719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:43,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122528054] [2021-10-07 15:11:43,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:11:43,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:43,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:43,793 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) [2021-10-07 15:11:43,798 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 [2021-10-07 15:11:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:45,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-07 15:11:45,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:45,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:11:45,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 110 [2021-10-07 15:11:45,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:45,527 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:11:45,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-10-07 15:11:45,610 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:11:45,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-07 15:11:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:46,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122528054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:46,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:46,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-07 15:11:46,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522160627] [2021-10-07 15:11:46,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:11:46,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:46,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:11:46,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:11:46,466 INFO L87 Difference]: Start difference. First operand 221 states and 626 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-10-07 15:11:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:47,390 INFO L93 Difference]: Finished difference Result 245 states and 662 transitions. [2021-10-07 15:11:47,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:11:47,391 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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 18 [2021-10-07 15:11:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:47,393 INFO L225 Difference]: With dead ends: 245 [2021-10-07 15:11:47,393 INFO L226 Difference]: Without dead ends: 221 [2021-10-07 15:11:47,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1369.2ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 15:11:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-10-07 15:11:47,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2021-10-07 15:11:47,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 211 states have (on average 2.881516587677725) internal successors, (608), 212 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 608 transitions. [2021-10-07 15:11:47,397 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 608 transitions. Word has length 18 [2021-10-07 15:11:47,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:47,397 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 608 transitions. [2021-10-07 15:11:47,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-10-07 15:11:47,398 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 608 transitions. [2021-10-07 15:11:47,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:11:47,398 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:47,398 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:47,426 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 [2021-10-07 15:11:47,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:47,599 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:11:47,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:47,600 INFO L82 PathProgramCache]: Analyzing trace with hash -48218369, now seen corresponding path program 26 times [2021-10-07 15:11:47,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:47,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759197464] [2021-10-07 15:11:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:47,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:48,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:48,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759197464] [2021-10-07 15:11:48,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759197464] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:48,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405021419] [2021-10-07 15:11:48,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:11:48,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:48,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:48,210 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) [2021-10-07 15:11:48,211 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 [2021-10-07 15:11:49,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:11:49,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:49,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-07 15:11:49,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:49,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:11:49,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:49,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:50,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405021419] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:50,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:50,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 15:11:50,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707048414] [2021-10-07 15:11:50,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 15:11:50,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:50,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 15:11:50,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:11:50,735 INFO L87 Difference]: Start difference. First operand 213 states and 608 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) [2021-10-07 15:11:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:51,455 INFO L93 Difference]: Finished difference Result 215 states and 605 transitions. [2021-10-07 15:11:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:11:51,456 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 18 [2021-10-07 15:11:51,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:51,458 INFO L225 Difference]: With dead ends: 215 [2021-10-07 15:11:51,458 INFO L226 Difference]: Without dead ends: 184 [2021-10-07 15:11:51,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1278.9ms TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:11:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-07 15:11:51,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2021-10-07 15:11:51,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 182 states have (on average 3.0714285714285716) internal successors, (559), 183 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:51,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 559 transitions. [2021-10-07 15:11:51,464 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 559 transitions. Word has length 18 [2021-10-07 15:11:51,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:51,464 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 559 transitions. [2021-10-07 15:11:51,464 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) [2021-10-07 15:11:51,464 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 559 transitions. [2021-10-07 15:11:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:11:51,465 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:51,465 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:51,493 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 [2021-10-07 15:11:51,665 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,SelfDestructingSolverStorable54 [2021-10-07 15:11:51,666 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:11:51,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:51,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1101287344, now seen corresponding path program 27 times [2021-10-07 15:11:51,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:51,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098747140] [2021-10-07 15:11:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:51,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:53,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:53,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098747140] [2021-10-07 15:11:53,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098747140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:53,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481441969] [2021-10-07 15:11:53,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:11:53,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:53,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:53,484 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) [2021-10-07 15:11:53,486 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 [2021-10-07 15:11:54,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:11:54,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:54,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-07 15:11:54,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-07 15:11:55,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481441969] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:55,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:55,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 22 [2021-10-07 15:11:55,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996917494] [2021-10-07 15:11:55,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 15:11:55,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:55,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 15:11:55,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:11:55,437 INFO L87 Difference]: Start difference. First operand 184 states and 559 transitions. Second operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-10-07 15:11:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:57,780 INFO L93 Difference]: Finished difference Result 234 states and 655 transitions. [2021-10-07 15:11:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:11:57,781 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 19 [2021-10-07 15:11:57,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:57,782 INFO L225 Difference]: With dead ends: 234 [2021-10-07 15:11:57,782 INFO L226 Difference]: Without dead ends: 234 [2021-10-07 15:11:57,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2844.9ms TimeCoverageRelationStatistics Valid=198, Invalid=1524, Unknown=0, NotChecked=0, Total=1722 [2021-10-07 15:11:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-10-07 15:11:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 172. [2021-10-07 15:11:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 170 states have (on average 3.041176470588235) internal successors, (517), 171 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 517 transitions. [2021-10-07 15:11:57,790 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 517 transitions. Word has length 19 [2021-10-07 15:11:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:57,790 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 517 transitions. [2021-10-07 15:11:57,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-10-07 15:11:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 517 transitions. [2021-10-07 15:11:57,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:11:57,792 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:57,792 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:57,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-10-07 15:11:58,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:58,008 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:11:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:58,008 INFO L82 PathProgramCache]: Analyzing trace with hash 200820737, now seen corresponding path program 28 times [2021-10-07 15:11:58,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:58,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795924938] [2021-10-07 15:11:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:58,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:59,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:59,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795924938] [2021-10-07 15:11:59,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795924938] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:59,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697612004] [2021-10-07 15:11:59,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:11:59,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:59,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:59,400 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) [2021-10-07 15:11:59,401 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 [2021-10-07 15:12:00,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:12:00,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:00,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-07 15:12:00,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:12:01,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697612004] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:01,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:01,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-07 15:12:01,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276003094] [2021-10-07 15:12:01,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:12:01,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:12:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:12:01,648 INFO L87 Difference]: Start difference. First operand 172 states and 517 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:12:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:03,210 INFO L93 Difference]: Finished difference Result 224 states and 649 transitions. [2021-10-07 15:12:03,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 15:12:03,210 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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 19 [2021-10-07 15:12:03,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:03,212 INFO L225 Difference]: With dead ends: 224 [2021-10-07 15:12:03,213 INFO L226 Difference]: Without dead ends: 224 [2021-10-07 15:12:03,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1822.9ms TimeCoverageRelationStatistics Valid=142, Invalid=1498, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 15:12:03,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-10-07 15:12:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 180. [2021-10-07 15:12:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 178 states have (on average 3.0168539325842696) internal successors, (537), 179 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 537 transitions. [2021-10-07 15:12:03,219 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 537 transitions. Word has length 19 [2021-10-07 15:12:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:03,219 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 537 transitions. [2021-10-07 15:12:03,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:12:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 537 transitions. [2021-10-07 15:12:03,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:12:03,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:03,220 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:03,257 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 [2021-10-07 15:12:03,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-07 15:12:03,436 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:12:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:03,436 INFO L82 PathProgramCache]: Analyzing trace with hash 200820738, now seen corresponding path program 19 times [2021-10-07 15:12:03,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:03,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381643715] [2021-10-07 15:12:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:03,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:06,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:06,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381643715] [2021-10-07 15:12:06,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381643715] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:06,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410496037] [2021-10-07 15:12:06,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:12:06,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:06,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:06,326 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) [2021-10-07 15:12:06,328 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 [2021-10-07 15:12:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:07,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-07 15:12:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:12:08,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410496037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:08,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:08,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-07 15:12:08,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883657502] [2021-10-07 15:12:08,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:12:08,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:08,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:12:08,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:12:08,732 INFO L87 Difference]: Start difference. First operand 180 states and 537 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:12:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:11,137 INFO L93 Difference]: Finished difference Result 276 states and 769 transitions. [2021-10-07 15:12:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 15:12:11,137 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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 19 [2021-10-07 15:12:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:11,139 INFO L225 Difference]: With dead ends: 276 [2021-10-07 15:12:11,140 INFO L226 Difference]: Without dead ends: 258 [2021-10-07 15:12:11,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2833.6ms TimeCoverageRelationStatistics Valid=185, Invalid=1795, Unknown=0, NotChecked=0, Total=1980 [2021-10-07 15:12:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-10-07 15:12:11,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 206. [2021-10-07 15:12:11,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 204 states have (on average 2.9411764705882355) internal successors, (600), 205 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:11,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 600 transitions. [2021-10-07 15:12:11,146 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 600 transitions. Word has length 19 [2021-10-07 15:12:11,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:11,146 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 600 transitions. [2021-10-07 15:12:11,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:12:11,147 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 600 transitions. [2021-10-07 15:12:11,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:12:11,147 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:11,147 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:11,175 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 [2021-10-07 15:12:11,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-07 15:12:11,348 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:12:11,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:11,349 INFO L82 PathProgramCache]: Analyzing trace with hash 158815427, now seen corresponding path program 29 times [2021-10-07 15:12:11,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:11,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227041830] [2021-10-07 15:12:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:11,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:12,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:12,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227041830] [2021-10-07 15:12:12,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227041830] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:12,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423438808] [2021-10-07 15:12:12,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:12:12,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:12,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:12,053 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) [2021-10-07 15:12:12,054 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 [2021-10-07 15:12:13,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:12:13,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:13,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-07 15:12:13,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:12:14,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423438808] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:14,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:14,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 27 [2021-10-07 15:12:14,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999022526] [2021-10-07 15:12:14,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-07 15:12:14,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:14,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-07 15:12:14,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2021-10-07 15:12:14,426 INFO L87 Difference]: Start difference. First operand 206 states and 600 transitions. Second operand has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 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) [2021-10-07 15:12:16,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:16,064 INFO L93 Difference]: Finished difference Result 498 states and 1412 transitions. [2021-10-07 15:12:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:12:16,065 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 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 19 [2021-10-07 15:12:16,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:16,069 INFO L225 Difference]: With dead ends: 498 [2021-10-07 15:12:16,069 INFO L226 Difference]: Without dead ends: 498 [2021-10-07 15:12:16,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1792.9ms TimeCoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 15:12:16,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-10-07 15:12:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 282. [2021-10-07 15:12:16,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 280 states have (on average 3.0642857142857145) internal successors, (858), 281 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 858 transitions. [2021-10-07 15:12:16,078 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 858 transitions. Word has length 19 [2021-10-07 15:12:16,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:16,079 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 858 transitions. [2021-10-07 15:12:16,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 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) [2021-10-07 15:12:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 858 transitions. [2021-10-07 15:12:16,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:12:16,080 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:16,080 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:16,113 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 [2021-10-07 15:12:16,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-07 15:12:16,292 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:12:16,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:16,293 INFO L82 PathProgramCache]: Analyzing trace with hash 158815428, now seen corresponding path program 20 times [2021-10-07 15:12:16,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:16,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430200225] [2021-10-07 15:12:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:16,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:17,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:17,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430200225] [2021-10-07 15:12:17,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430200225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:17,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916797542] [2021-10-07 15:12:17,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:12:17,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:17,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:17,844 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) [2021-10-07 15:12:17,845 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 [2021-10-07 15:12:19,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:12:19,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:19,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-07 15:12:19,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:12:20,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916797542] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:20,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:20,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-07 15:12:20,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014099492] [2021-10-07 15:12:20,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:12:20,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:20,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:12:20,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=807, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:12:20,336 INFO L87 Difference]: Start difference. First operand 282 states and 858 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:12:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:24,014 INFO L93 Difference]: Finished difference Result 502 states and 1310 transitions. [2021-10-07 15:12:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-07 15:12:24,014 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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 19 [2021-10-07 15:12:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:24,017 INFO L225 Difference]: With dead ends: 502 [2021-10-07 15:12:24,017 INFO L226 Difference]: Without dead ends: 460 [2021-10-07 15:12:24,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 3712.8ms TimeCoverageRelationStatistics Valid=261, Invalid=2709, Unknown=0, NotChecked=0, Total=2970 [2021-10-07 15:12:24,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-10-07 15:12:24,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 282. [2021-10-07 15:12:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 280 states have (on average 2.8785714285714286) internal successors, (806), 281 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 806 transitions. [2021-10-07 15:12:24,026 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 806 transitions. Word has length 19 [2021-10-07 15:12:24,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:24,026 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 806 transitions. [2021-10-07 15:12:24,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:12:24,027 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 806 transitions. [2021-10-07 15:12:24,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:12:24,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:24,028 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:24,061 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 [2021-10-07 15:12:24,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:24,242 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:12:24,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:24,243 INFO L82 PathProgramCache]: Analyzing trace with hash 157416707, now seen corresponding path program 30 times [2021-10-07 15:12:24,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:24,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027029585] [2021-10-07 15:12:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:24,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:26,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:26,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027029585] [2021-10-07 15:12:26,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027029585] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:26,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614855028] [2021-10-07 15:12:26,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:12:26,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:26,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:26,560 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) [2021-10-07 15:12:26,561 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 [2021-10-07 15:12:28,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:12:28,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:28,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-07 15:12:28,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:12:29,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614855028] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:29,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:29,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-10-07 15:12:29,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515236578] [2021-10-07 15:12:29,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:12:29,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:29,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:12:29,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:12:29,262 INFO L87 Difference]: Start difference. First operand 282 states and 806 transitions. Second operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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) [2021-10-07 15:12:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:32,315 INFO L93 Difference]: Finished difference Result 370 states and 1040 transitions. [2021-10-07 15:12:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 15:12:32,315 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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 19 [2021-10-07 15:12:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:32,318 INFO L225 Difference]: With dead ends: 370 [2021-10-07 15:12:32,318 INFO L226 Difference]: Without dead ends: 370 [2021-10-07 15:12:32,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 3645.1ms TimeCoverageRelationStatistics Valid=180, Invalid=2172, Unknown=0, NotChecked=0, Total=2352 [2021-10-07 15:12:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-10-07 15:12:32,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 292. [2021-10-07 15:12:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 290 states have (on average 2.872413793103448) internal successors, (833), 291 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 833 transitions. [2021-10-07 15:12:32,326 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 833 transitions. Word has length 19 [2021-10-07 15:12:32,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:32,326 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 833 transitions. [2021-10-07 15:12:32,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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) [2021-10-07 15:12:32,326 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 833 transitions. [2021-10-07 15:12:32,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:12:32,327 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:32,327 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:32,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-10-07 15:12:32,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:32,534 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:12:32,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:32,535 INFO L82 PathProgramCache]: Analyzing trace with hash 157416708, now seen corresponding path program 21 times [2021-10-07 15:12:32,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:32,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538691639] [2021-10-07 15:12:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:32,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:34,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:34,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538691639] [2021-10-07 15:12:34,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538691639] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:34,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015300558] [2021-10-07 15:12:34,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:12:34,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:34,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:34,327 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) [2021-10-07 15:12:34,328 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 [2021-10-07 15:12:36,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:12:36,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:36,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 15:12:36,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-07 15:12:36,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015300558] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:36,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:36,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 24 [2021-10-07 15:12:36,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516648307] [2021-10-07 15:12:36,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 15:12:36,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:36,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 15:12:36,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:12:36,733 INFO L87 Difference]: Start difference. First operand 292 states and 833 transitions. Second operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 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) [2021-10-07 15:12:40,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:40,341 INFO L93 Difference]: Finished difference Result 444 states and 1203 transitions. [2021-10-07 15:12:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-07 15:12:40,343 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 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 19 [2021-10-07 15:12:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:40,346 INFO L225 Difference]: With dead ends: 444 [2021-10-07 15:12:40,346 INFO L226 Difference]: Without dead ends: 440 [2021-10-07 15:12:40,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 3390.3ms TimeCoverageRelationStatistics Valid=222, Invalid=2328, Unknown=0, NotChecked=0, Total=2550 [2021-10-07 15:12:40,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-10-07 15:12:40,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 330. [2021-10-07 15:12:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 328 states have (on average 2.902439024390244) internal successors, (952), 329 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 952 transitions. [2021-10-07 15:12:40,356 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 952 transitions. Word has length 19 [2021-10-07 15:12:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:40,356 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 952 transitions. [2021-10-07 15:12:40,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 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) [2021-10-07 15:12:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 952 transitions. [2021-10-07 15:12:40,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:12:40,357 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:40,357 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:40,387 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 [2021-10-07 15:12:40,559 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,SelfDestructingSolverStorable61 [2021-10-07 15:12:40,560 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:12:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1143349183, now seen corresponding path program 31 times [2021-10-07 15:12:40,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:40,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369236644] [2021-10-07 15:12:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:40,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:44,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:44,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369236644] [2021-10-07 15:12:44,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369236644] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:44,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260889619] [2021-10-07 15:12:44,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:12:44,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:44,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:44,112 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) [2021-10-07 15:12:44,113 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 [2021-10-07 15:12:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:45,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-07 15:12:45,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:12:46,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260889619] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:46,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:46,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-10-07 15:12:46,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591078758] [2021-10-07 15:12:46,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:12:46,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:46,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:12:46,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:12:46,698 INFO L87 Difference]: Start difference. First operand 330 states and 952 transitions. Second operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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) [2021-10-07 15:12:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:50,103 INFO L93 Difference]: Finished difference Result 696 states and 1969 transitions. [2021-10-07 15:12:50,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-07 15:12:50,103 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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 19 [2021-10-07 15:12:50,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:50,107 INFO L225 Difference]: With dead ends: 696 [2021-10-07 15:12:50,107 INFO L226 Difference]: Without dead ends: 694 [2021-10-07 15:12:50,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 3807.2ms TimeCoverageRelationStatistics Valid=241, Invalid=2839, Unknown=0, NotChecked=0, Total=3080 [2021-10-07 15:12:50,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-10-07 15:12:50,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 444. [2021-10-07 15:12:50,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 442 states have (on average 3.0339366515837103) internal successors, (1341), 443 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1341 transitions. [2021-10-07 15:12:50,138 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1341 transitions. Word has length 19 [2021-10-07 15:12:50,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:50,138 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 1341 transitions. [2021-10-07 15:12:50,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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) [2021-10-07 15:12:50,138 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1341 transitions. [2021-10-07 15:12:50,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:12:50,140 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:50,140 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:50,182 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 [2021-10-07 15:12:50,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:50,355 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:12:50,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:50,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1143349182, now seen corresponding path program 22 times [2021-10-07 15:12:50,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:50,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901113012] [2021-10-07 15:12:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:50,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:52,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:52,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901113012] [2021-10-07 15:12:52,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901113012] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:52,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430057663] [2021-10-07 15:12:52,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:12:52,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:52,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:52,413 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) [2021-10-07 15:12:52,414 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 [2021-10-07 15:12:54,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:12:54,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:54,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-07 15:12:54,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:12:55,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430057663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:55,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:55,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-07 15:12:55,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071174735] [2021-10-07 15:12:55,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:12:55,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:12:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=807, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:12:55,137 INFO L87 Difference]: Start difference. First operand 444 states and 1341 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:12:58,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:58,021 INFO L93 Difference]: Finished difference Result 608 states and 1653 transitions. [2021-10-07 15:12:58,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 15:12:58,022 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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 19 [2021-10-07 15:12:58,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:58,026 INFO L225 Difference]: With dead ends: 608 [2021-10-07 15:12:58,026 INFO L226 Difference]: Without dead ends: 560 [2021-10-07 15:12:58,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 3481.2ms TimeCoverageRelationStatistics Valid=188, Invalid=2164, Unknown=0, NotChecked=0, Total=2352 [2021-10-07 15:12:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-10-07 15:12:58,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 378. [2021-10-07 15:12:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 376 states have (on average 2.8404255319148937) internal successors, (1068), 377 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1068 transitions. [2021-10-07 15:12:58,037 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1068 transitions. Word has length 19 [2021-10-07 15:12:58,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:58,037 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1068 transitions. [2021-10-07 15:12:58,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:12:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1068 transitions. [2021-10-07 15:12:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:12:58,038 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:58,038 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:58,071 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 [2021-10-07 15:12:58,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:58,249 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:12:58,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:58,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1144747903, now seen corresponding path program 32 times [2021-10-07 15:12:58,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:58,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491074540] [2021-10-07 15:12:58,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:58,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:58,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:58,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491074540] [2021-10-07 15:12:58,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491074540] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:58,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671510156] [2021-10-07 15:12:58,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:12:58,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:58,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:58,999 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) [2021-10-07 15:12:59,000 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 [2021-10-07 15:13:00,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:13:00,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:00,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-07 15:13:00,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:13:01,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671510156] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:01,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:01,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-07 15:13:01,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974712333] [2021-10-07 15:13:01,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:13:01,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:01,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:13:01,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:13:01,523 INFO L87 Difference]: Start difference. First operand 378 states and 1068 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:13:03,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:03,883 INFO L93 Difference]: Finished difference Result 644 states and 1745 transitions. [2021-10-07 15:13:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-07 15:13:03,884 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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 19 [2021-10-07 15:13:03,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:03,889 INFO L225 Difference]: With dead ends: 644 [2021-10-07 15:13:03,890 INFO L226 Difference]: Without dead ends: 638 [2021-10-07 15:13:03,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2366.1ms TimeCoverageRelationStatistics Valid=230, Invalid=2526, Unknown=0, NotChecked=0, Total=2756 [2021-10-07 15:13:03,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-10-07 15:13:03,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 472. [2021-10-07 15:13:03,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 470 states have (on average 2.9851063829787234) internal successors, (1403), 471 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1403 transitions. [2021-10-07 15:13:03,906 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1403 transitions. Word has length 19 [2021-10-07 15:13:03,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:03,907 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1403 transitions. [2021-10-07 15:13:03,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:13:03,907 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1403 transitions. [2021-10-07 15:13:03,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:13:03,909 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:03,909 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:03,956 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 [2021-10-07 15:13:04,124 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,SelfDestructingSolverStorable64 [2021-10-07 15:13:04,124 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:13:04,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:04,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1186708046, now seen corresponding path program 33 times [2021-10-07 15:13:04,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:04,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816794643] [2021-10-07 15:13:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:04,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:04,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:04,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816794643] [2021-10-07 15:13:04,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816794643] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:04,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884793716] [2021-10-07 15:13:04,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:13:04,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:04,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:04,863 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) [2021-10-07 15:13:04,866 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 [2021-10-07 15:13:07,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:13:07,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:07,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-07 15:13:07,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:08,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884793716] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:08,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:08,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 15:13:08,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939873132] [2021-10-07 15:13:08,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 15:13:08,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:08,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 15:13:08,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:13:08,209 INFO L87 Difference]: Start difference. First operand 472 states and 1403 transitions. Second operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 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) [2021-10-07 15:13:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:09,789 INFO L93 Difference]: Finished difference Result 624 states and 1779 transitions. [2021-10-07 15:13:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-07 15:13:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 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 19 [2021-10-07 15:13:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:09,792 INFO L225 Difference]: With dead ends: 624 [2021-10-07 15:13:09,792 INFO L226 Difference]: Without dead ends: 624 [2021-10-07 15:13:09,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1912.7ms TimeCoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2021-10-07 15:13:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-10-07 15:13:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 496. [2021-10-07 15:13:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 494 states have (on average 3.0020242914979756) internal successors, (1483), 495 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1483 transitions. [2021-10-07 15:13:09,805 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1483 transitions. Word has length 19 [2021-10-07 15:13:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:09,805 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 1483 transitions. [2021-10-07 15:13:09,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 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) [2021-10-07 15:13:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1483 transitions. [2021-10-07 15:13:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:13:09,806 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:09,807 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:09,850 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 [2021-10-07 15:13:10,020 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,SelfDestructingSolverStorable65 [2021-10-07 15:13:10,021 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:13:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:10,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1186753213, now seen corresponding path program 34 times [2021-10-07 15:13:10,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:10,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666354715] [2021-10-07 15:13:10,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:10,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:10,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:10,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666354715] [2021-10-07 15:13:10,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666354715] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:10,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909557365] [2021-10-07 15:13:10,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:13:10,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:10,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:10,714 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) [2021-10-07 15:13:10,717 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 [2021-10-07 15:13:12,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:13:12,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:12,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-07 15:13:12,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:13:13,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909557365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:13,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:13,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 26 [2021-10-07 15:13:13,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039977163] [2021-10-07 15:13:13,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-07 15:13:13,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:13,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-07 15:13:13,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:13:13,273 INFO L87 Difference]: Start difference. First operand 496 states and 1483 transitions. Second operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 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) [2021-10-07 15:13:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:15,052 INFO L93 Difference]: Finished difference Result 684 states and 1959 transitions. [2021-10-07 15:13:15,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-07 15:13:15,053 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 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 19 [2021-10-07 15:13:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:15,056 INFO L225 Difference]: With dead ends: 684 [2021-10-07 15:13:15,056 INFO L226 Difference]: Without dead ends: 680 [2021-10-07 15:13:15,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1833.1ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-10-07 15:13:15,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-10-07 15:13:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 542. [2021-10-07 15:13:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 540 states have (on average 3.051851851851852) internal successors, (1648), 541 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1648 transitions. [2021-10-07 15:13:15,070 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1648 transitions. Word has length 19 [2021-10-07 15:13:15,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:15,070 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1648 transitions. [2021-10-07 15:13:15,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 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) [2021-10-07 15:13:15,070 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1648 transitions. [2021-10-07 15:13:15,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:13:15,071 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:15,071 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:15,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-10-07 15:13:15,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:15,272 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:13:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:15,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1439220867, now seen corresponding path program 35 times [2021-10-07 15:13:15,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:15,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054193563] [2021-10-07 15:13:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:15,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:15,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:15,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054193563] [2021-10-07 15:13:15,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054193563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:15,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618391770] [2021-10-07 15:13:15,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:13:15,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:15,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:15,967 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) [2021-10-07 15:13:15,974 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 [2021-10-07 15:13:17,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:13:17,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:17,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-07 15:13:17,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:13:18,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618391770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:18,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:18,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-07 15:13:18,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149624639] [2021-10-07 15:13:18,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:13:18,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:18,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:13:18,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:13:18,515 INFO L87 Difference]: Start difference. First operand 542 states and 1648 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:13:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:20,081 INFO L93 Difference]: Finished difference Result 834 states and 2470 transitions. [2021-10-07 15:13:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:13:20,082 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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 19 [2021-10-07 15:13:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:20,084 INFO L225 Difference]: With dead ends: 834 [2021-10-07 15:13:20,084 INFO L226 Difference]: Without dead ends: 834 [2021-10-07 15:13:20,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1677.2ms TimeCoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 15:13:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-10-07 15:13:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 606. [2021-10-07 15:13:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 604 states have (on average 3.076158940397351) internal successors, (1858), 605 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1858 transitions. [2021-10-07 15:13:20,100 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1858 transitions. Word has length 19 [2021-10-07 15:13:20,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:20,100 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 1858 transitions. [2021-10-07 15:13:20,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:13:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1858 transitions. [2021-10-07 15:13:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:13:20,102 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:20,102 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:20,149 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 [2021-10-07 15:13:20,317 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,SelfDestructingSolverStorable67 [2021-10-07 15:13:20,317 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:13:20,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:20,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1439220868, now seen corresponding path program 23 times [2021-10-07 15:13:20,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:20,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989466999] [2021-10-07 15:13:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:20,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:22,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:22,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989466999] [2021-10-07 15:13:22,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989466999] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:22,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227027215] [2021-10-07 15:13:22,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:13:22,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:22,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:22,915 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) [2021-10-07 15:13:22,916 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 [2021-10-07 15:13:24,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:13:24,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:24,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-07 15:13:24,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:13:25,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227027215] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:25,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:25,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-07 15:13:25,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306303341] [2021-10-07 15:13:25,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:13:25,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:25,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:13:25,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:13:25,669 INFO L87 Difference]: Start difference. First operand 606 states and 1858 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:13:28,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:28,097 INFO L93 Difference]: Finished difference Result 748 states and 2137 transitions. [2021-10-07 15:13:28,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:13:28,098 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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 19 [2021-10-07 15:13:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:28,100 INFO L225 Difference]: With dead ends: 748 [2021-10-07 15:13:28,100 INFO L226 Difference]: Without dead ends: 710 [2021-10-07 15:13:28,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2773.4ms TimeCoverageRelationStatistics Valid=173, Invalid=1989, Unknown=0, NotChecked=0, Total=2162 [2021-10-07 15:13:28,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-10-07 15:13:28,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 580. [2021-10-07 15:13:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 578 states have (on average 2.9671280276816607) internal successors, (1715), 579 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:28,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1715 transitions. [2021-10-07 15:13:28,111 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1715 transitions. Word has length 19 [2021-10-07 15:13:28,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:28,111 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 1715 transitions. [2021-10-07 15:13:28,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:13:28,111 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1715 transitions. [2021-10-07 15:13:28,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:13:28,112 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:28,112 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:28,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-10-07 15:13:28,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-10-07 15:13:28,313 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:13:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:28,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1395860547, now seen corresponding path program 36 times [2021-10-07 15:13:28,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:28,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033571103] [2021-10-07 15:13:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:28,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:29,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:29,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033571103] [2021-10-07 15:13:29,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033571103] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:29,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186871398] [2021-10-07 15:13:29,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:13:29,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:29,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:29,811 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) [2021-10-07 15:13:29,812 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 [2021-10-07 15:13:32,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:13:32,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:32,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-07 15:13:32,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:33,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186871398] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:33,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:33,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 31 [2021-10-07 15:13:33,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680723582] [2021-10-07 15:13:33,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-07 15:13:33,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:33,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-07 15:13:33,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=974, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 15:13:33,311 INFO L87 Difference]: Start difference. First operand 580 states and 1715 transitions. Second operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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) [2021-10-07 15:13:36,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:36,430 INFO L93 Difference]: Finished difference Result 982 states and 2952 transitions. [2021-10-07 15:13:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-07 15:13:36,430 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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 19 [2021-10-07 15:13:36,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:36,434 INFO L225 Difference]: With dead ends: 982 [2021-10-07 15:13:36,434 INFO L226 Difference]: Without dead ends: 982 [2021-10-07 15:13:36,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 3191.2ms TimeCoverageRelationStatistics Valid=258, Invalid=3048, Unknown=0, NotChecked=0, Total=3306 [2021-10-07 15:13:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-10-07 15:13:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 726. [2021-10-07 15:13:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 724 states have (on average 3.218232044198895) internal successors, (2330), 725 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2330 transitions. [2021-10-07 15:13:36,453 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2330 transitions. Word has length 19 [2021-10-07 15:13:36,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:36,453 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 2330 transitions. [2021-10-07 15:13:36,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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) [2021-10-07 15:13:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2330 transitions. [2021-10-07 15:13:36,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:13:36,454 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:36,455 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:36,489 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 [2021-10-07 15:13:36,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-10-07 15:13:36,669 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:13:36,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:36,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1395860548, now seen corresponding path program 24 times [2021-10-07 15:13:36,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:36,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574225002] [2021-10-07 15:13:36,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:36,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:39,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:39,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574225002] [2021-10-07 15:13:39,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574225002] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:39,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771930914] [2021-10-07 15:13:39,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:13:39,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:39,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:39,400 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) [2021-10-07 15:13:39,404 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 [2021-10-07 15:13:41,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:13:41,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:41,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-07 15:13:41,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:13:42,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771930914] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:42,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:42,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-07 15:13:42,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83509973] [2021-10-07 15:13:42,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:13:42,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:42,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:13:42,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:13:42,239 INFO L87 Difference]: Start difference. First operand 726 states and 2330 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:13:43,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:43,880 INFO L93 Difference]: Finished difference Result 874 states and 2710 transitions. [2021-10-07 15:13:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:13:43,880 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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 19 [2021-10-07 15:13:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:43,882 INFO L225 Difference]: With dead ends: 874 [2021-10-07 15:13:43,882 INFO L226 Difference]: Without dead ends: 866 [2021-10-07 15:13:43,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 2019.1ms TimeCoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2021-10-07 15:13:43,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-10-07 15:13:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 752. [2021-10-07 15:13:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 750 states have (on average 3.2066666666666666) internal successors, (2405), 751 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2405 transitions. [2021-10-07 15:13:43,896 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2405 transitions. Word has length 19 [2021-10-07 15:13:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:43,896 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2405 transitions. [2021-10-07 15:13:43,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:13:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2405 transitions. [2021-10-07 15:13:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 15:13:43,897 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:43,897 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:43,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-10-07 15:13:44,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:44,098 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:13:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:44,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1018568833, now seen corresponding path program 37 times [2021-10-07 15:13:44,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:44,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903550947] [2021-10-07 15:13:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:44,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:45,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:45,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903550947] [2021-10-07 15:13:45,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903550947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:45,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351977157] [2021-10-07 15:13:45,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:13:45,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:45,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:45,340 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) [2021-10-07 15:13:45,341 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 [2021-10-07 15:13:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:47,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-07 15:13:47,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:13:48,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351977157] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:48,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:48,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 30 [2021-10-07 15:13:48,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288050293] [2021-10-07 15:13:48,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 15:13:48,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:48,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 15:13:48,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:13:48,240 INFO L87 Difference]: Start difference. First operand 752 states and 2405 transitions. Second operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 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) [2021-10-07 15:13:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:50,995 INFO L93 Difference]: Finished difference Result 908 states and 2806 transitions. [2021-10-07 15:13:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-07 15:13:50,995 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 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 20 [2021-10-07 15:13:50,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:50,998 INFO L225 Difference]: With dead ends: 908 [2021-10-07 15:13:50,998 INFO L226 Difference]: Without dead ends: 908 [2021-10-07 15:13:50,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 3110.2ms TimeCoverageRelationStatistics Valid=262, Invalid=2930, Unknown=0, NotChecked=0, Total=3192 [2021-10-07 15:13:50,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-10-07 15:13:51,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 752. [2021-10-07 15:13:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 750 states have (on average 3.2066666666666666) internal successors, (2405), 751 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2405 transitions. [2021-10-07 15:13:51,014 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2405 transitions. Word has length 20 [2021-10-07 15:13:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:51,015 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2405 transitions. [2021-10-07 15:13:51,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 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) [2021-10-07 15:13:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2405 transitions. [2021-10-07 15:13:51,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 15:13:51,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:51,016 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:51,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-10-07 15:13:51,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:51,230 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:13:51,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:51,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1018568832, now seen corresponding path program 25 times [2021-10-07 15:13:51,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:51,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498557835] [2021-10-07 15:13:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:51,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:58,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:58,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498557835] [2021-10-07 15:13:58,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498557835] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:58,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595039579] [2021-10-07 15:13:58,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:13:58,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:58,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:58,271 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) [2021-10-07 15:13:58,272 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 [2021-10-07 15:14:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:00,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-07 15:14:00,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:14:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:14:01,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595039579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:01,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:14:01,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 30 [2021-10-07 15:14:01,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152144094] [2021-10-07 15:14:01,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 15:14:01,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:14:01,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 15:14:01,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=923, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:14:01,454 INFO L87 Difference]: Start difference. First operand 752 states and 2405 transitions. Second operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 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) [2021-10-07 15:14:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:14:05,695 INFO L93 Difference]: Finished difference Result 914 states and 2797 transitions. [2021-10-07 15:14:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-07 15:14:05,695 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 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 20 [2021-10-07 15:14:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:14:05,698 INFO L225 Difference]: With dead ends: 914 [2021-10-07 15:14:05,699 INFO L226 Difference]: Without dead ends: 906 [2021-10-07 15:14:05,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 4928.3ms TimeCoverageRelationStatistics Valid=261, Invalid=3045, Unknown=0, NotChecked=0, Total=3306 [2021-10-07 15:14:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-10-07 15:14:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 744. [2021-10-07 15:14:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 742 states have (on average 3.2088948787061993) internal successors, (2381), 743 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2381 transitions. [2021-10-07 15:14:05,718 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2381 transitions. Word has length 20 [2021-10-07 15:14:05,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:14:05,718 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 2381 transitions. [2021-10-07 15:14:05,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 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) [2021-10-07 15:14:05,719 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2381 transitions. [2021-10-07 15:14:05,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 15:14:05,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:14:05,720 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:14:05,755 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 [2021-10-07 15:14:05,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:05,934 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:14:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:14:05,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1974190144, now seen corresponding path program 26 times [2021-10-07 15:14:05,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:14:05,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368029399] [2021-10-07 15:14:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:14:05,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:14:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:14:07,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:14:07,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368029399] [2021-10-07 15:14:07,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368029399] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:07,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157545112] [2021-10-07 15:14:07,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:14:07,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:07,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:14:07,745 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) [2021-10-07 15:14:07,746 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 [2021-10-07 15:14:09,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:14:09,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:14:09,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-07 15:14:09,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:14:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:14:10,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157545112] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:10,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:14:10,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 29 [2021-10-07 15:14:10,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088336274] [2021-10-07 15:14:10,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:14:10,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:14:10,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:14:10,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:14:10,811 INFO L87 Difference]: Start difference. First operand 744 states and 2381 transitions. Second operand has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 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) [2021-10-07 15:14:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:14:15,137 INFO L93 Difference]: Finished difference Result 1114 states and 3287 transitions. [2021-10-07 15:14:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-07 15:14:15,138 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 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 20 [2021-10-07 15:14:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:14:15,140 INFO L225 Difference]: With dead ends: 1114 [2021-10-07 15:14:15,140 INFO L226 Difference]: Without dead ends: 1080 [2021-10-07 15:14:15,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 4652.3ms TimeCoverageRelationStatistics Valid=312, Invalid=3110, Unknown=0, NotChecked=0, Total=3422 [2021-10-07 15:14:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-10-07 15:14:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 882. [2021-10-07 15:14:15,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 880 states have (on average 3.0534090909090907) internal successors, (2687), 881 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:15,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2687 transitions. [2021-10-07 15:14:15,158 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2687 transitions. Word has length 20 [2021-10-07 15:14:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:14:15,158 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2687 transitions. [2021-10-07 15:14:15,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 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) [2021-10-07 15:14:15,158 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2687 transitions. [2021-10-07 15:14:15,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 15:14:15,159 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:14:15,159 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:14:15,190 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 [2021-10-07 15:14:15,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:15,361 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:14:15,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:14:15,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1932230000, now seen corresponding path program 38 times [2021-10-07 15:14:15,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:14:15,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381331080] [2021-10-07 15:14:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:14:15,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:14:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:14:17,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:14:17,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381331080] [2021-10-07 15:14:17,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381331080] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:17,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760394367] [2021-10-07 15:14:17,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:14:17,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:17,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:14:17,867 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) [2021-10-07 15:14:17,868 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 [2021-10-07 15:14:19,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:14:19,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:14:19,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-07 15:14:19,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:14:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-07 15:14:20,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760394367] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:20,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:14:20,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 27 [2021-10-07 15:14:20,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475005054] [2021-10-07 15:14:20,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-07 15:14:20,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:14:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-07 15:14:20,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-10-07 15:14:20,701 INFO L87 Difference]: Start difference. First operand 882 states and 2687 transitions. Second operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 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) [2021-10-07 15:14:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:14:25,469 INFO L93 Difference]: Finished difference Result 1080 states and 3210 transitions. [2021-10-07 15:14:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-07 15:14:25,470 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 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 20 [2021-10-07 15:14:25,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:14:25,472 INFO L225 Difference]: With dead ends: 1080 [2021-10-07 15:14:25,472 INFO L226 Difference]: Without dead ends: 1080 [2021-10-07 15:14:25,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 5084.7ms TimeCoverageRelationStatistics Valid=310, Invalid=3112, Unknown=0, NotChecked=0, Total=3422 [2021-10-07 15:14:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-10-07 15:14:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 908. [2021-10-07 15:14:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 906 states have (on average 3.0573951434878586) internal successors, (2770), 907 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2770 transitions. [2021-10-07 15:14:25,491 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2770 transitions. Word has length 20 [2021-10-07 15:14:25,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:14:25,492 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 2770 transitions. [2021-10-07 15:14:25,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 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) [2021-10-07 15:14:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2770 transitions. [2021-10-07 15:14:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 15:14:25,493 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:14:25,493 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:14:25,525 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 [2021-10-07 15:14:25,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:25,694 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:14:25,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:14:25,695 INFO L82 PathProgramCache]: Analyzing trace with hash 261836607, now seen corresponding path program 39 times [2021-10-07 15:14:25,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:14:25,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726350651] [2021-10-07 15:14:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:14:25,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:14:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:14:27,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:14:27,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726350651] [2021-10-07 15:14:27,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726350651] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:27,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21909619] [2021-10-07 15:14:27,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:14:27,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:27,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:14:27,628 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) [2021-10-07 15:14:27,629 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 [2021-10-07 15:14:29,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:14:29,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:14:29,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-07 15:14:29,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:14:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:14:31,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21909619] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:31,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:14:31,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 32 [2021-10-07 15:14:31,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273039171] [2021-10-07 15:14:31,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-07 15:14:31,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:14:31,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-07 15:14:31,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 15:14:31,140 INFO L87 Difference]: Start difference. First operand 908 states and 2770 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 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) [2021-10-07 15:14:34,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:14:34,207 INFO L93 Difference]: Finished difference Result 1088 states and 3274 transitions. [2021-10-07 15:14:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:14:34,207 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 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 20 [2021-10-07 15:14:34,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:14:34,211 INFO L225 Difference]: With dead ends: 1088 [2021-10-07 15:14:34,211 INFO L226 Difference]: Without dead ends: 1088 [2021-10-07 15:14:34,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 3859.5ms TimeCoverageRelationStatistics Valid=236, Invalid=2626, Unknown=0, NotChecked=0, Total=2862 [2021-10-07 15:14:34,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-10-07 15:14:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 912. [2021-10-07 15:14:34,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 910 states have (on average 3.0527472527472526) internal successors, (2778), 911 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2778 transitions. [2021-10-07 15:14:34,236 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2778 transitions. Word has length 20 [2021-10-07 15:14:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:14:34,237 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2778 transitions. [2021-10-07 15:14:34,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 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) [2021-10-07 15:14:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2778 transitions. [2021-10-07 15:14:34,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 15:14:34,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:14:34,238 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:14:34,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-10-07 15:14:34,453 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,SelfDestructingSolverStorable75 [2021-10-07 15:14:34,453 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:14:34,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:14:34,454 INFO L82 PathProgramCache]: Analyzing trace with hash 261836608, now seen corresponding path program 27 times [2021-10-07 15:14:34,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:14:34,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851763139] [2021-10-07 15:14:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:14:34,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:14:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:14:36,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:14:36,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851763139] [2021-10-07 15:14:36,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851763139] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:36,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930704372] [2021-10-07 15:14:36,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:14:36,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:36,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:14:36,182 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) [2021-10-07 15:14:36,184 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 [2021-10-07 15:14:38,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:14:38,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:14:38,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-07 15:14:38,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:14:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:14:39,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930704372] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:39,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:14:39,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 27 [2021-10-07 15:14:39,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146082838] [2021-10-07 15:14:39,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-07 15:14:39,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:14:39,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-07 15:14:39,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=751, Unknown=0, NotChecked=0, Total=812 [2021-10-07 15:14:39,233 INFO L87 Difference]: Start difference. First operand 912 states and 2778 transitions. Second operand has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 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) [2021-10-07 15:14:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:14:42,363 INFO L93 Difference]: Finished difference Result 1100 states and 3246 transitions. [2021-10-07 15:14:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 15:14:42,364 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 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 20 [2021-10-07 15:14:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:14:42,366 INFO L225 Difference]: With dead ends: 1100 [2021-10-07 15:14:42,366 INFO L226 Difference]: Without dead ends: 1088 [2021-10-07 15:14:42,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 3565.5ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-10-07 15:14:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-10-07 15:14:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 906. [2021-10-07 15:14:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 904 states have (on average 3.045353982300885) internal successors, (2753), 905 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2753 transitions. [2021-10-07 15:14:42,385 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2753 transitions. Word has length 20 [2021-10-07 15:14:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:14:42,385 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2753 transitions. [2021-10-07 15:14:42,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 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) [2021-10-07 15:14:42,386 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2753 transitions. [2021-10-07 15:14:42,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 15:14:42,387 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:14:42,387 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:14:42,426 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 [2021-10-07 15:14:42,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-10-07 15:14:42,600 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:14:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:14:42,601 INFO L82 PathProgramCache]: Analyzing trace with hash 219831297, now seen corresponding path program 40 times [2021-10-07 15:14:42,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:14:42,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359168204] [2021-10-07 15:14:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:14:42,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:14:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:14:46,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:14:46,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359168204] [2021-10-07 15:14:46,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359168204] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:46,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176682328] [2021-10-07 15:14:46,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:14:46,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:46,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:14:46,746 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) [2021-10-07 15:14:46,747 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 [2021-10-07 15:14:48,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:14:48,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:14:48,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-07 15:14:48,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:14:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:14:49,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176682328] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:49,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:14:49,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 29 [2021-10-07 15:14:49,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959559874] [2021-10-07 15:14:49,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:14:49,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:14:49,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:14:49,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:14:49,862 INFO L87 Difference]: Start difference. First operand 906 states and 2753 transitions. Second operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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) [2021-10-07 15:14:53,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:14:53,648 INFO L93 Difference]: Finished difference Result 1018 states and 3011 transitions. [2021-10-07 15:14:53,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-07 15:14:53,649 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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 20 [2021-10-07 15:14:53,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:14:53,652 INFO L225 Difference]: With dead ends: 1018 [2021-10-07 15:14:53,652 INFO L226 Difference]: Without dead ends: 1010 [2021-10-07 15:14:53,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 4555.5ms TimeCoverageRelationStatistics Valid=260, Invalid=2392, Unknown=0, NotChecked=0, Total=2652 [2021-10-07 15:14:53,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-10-07 15:14:53,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 892. [2021-10-07 15:14:53,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 890 states have (on average 3.042696629213483) internal successors, (2708), 891 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2708 transitions. [2021-10-07 15:14:53,675 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2708 transitions. Word has length 20 [2021-10-07 15:14:53,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:14:53,675 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 2708 transitions. [2021-10-07 15:14:53,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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) [2021-10-07 15:14:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2708 transitions. [2021-10-07 15:14:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 15:14:53,676 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:14:53,677 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:14:53,728 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 [2021-10-07 15:14:53,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:53,893 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:14:53,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:14:53,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1866756831, now seen corresponding path program 41 times [2021-10-07 15:14:53,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:14:53,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066372278] [2021-10-07 15:14:53,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:14:53,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:14:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:14:54,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:14:54,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066372278] [2021-10-07 15:14:54,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066372278] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:54,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850096751] [2021-10-07 15:14:54,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:14:54,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:54,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:14:54,506 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) [2021-10-07 15:14:54,508 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 [2021-10-07 15:14:56,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:14:56,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:14:56,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-07 15:14:56,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:14:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:14:57,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850096751] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:57,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:14:57,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2021-10-07 15:14:57,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654850673] [2021-10-07 15:14:57,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-07 15:14:57,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:14:57,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-07 15:14:57,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 15:14:57,890 INFO L87 Difference]: Start difference. First operand 892 states and 2708 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 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) [2021-10-07 15:15:05,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:15:05,704 INFO L93 Difference]: Finished difference Result 2012 states and 5922 transitions. [2021-10-07 15:15:05,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-07 15:15:05,704 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 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 20 [2021-10-07 15:15:05,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:15:05,712 INFO L225 Difference]: With dead ends: 2012 [2021-10-07 15:15:05,712 INFO L226 Difference]: Without dead ends: 2012 [2021-10-07 15:15:05,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 7156.1ms TimeCoverageRelationStatistics Valid=1262, Invalid=8440, Unknown=0, NotChecked=0, Total=9702 [2021-10-07 15:15:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-10-07 15:15:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1298. [2021-10-07 15:15:05,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1296 states have (on average 3.3248456790123457) internal successors, (4309), 1297 states have internal predecessors, (4309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 4309 transitions. [2021-10-07 15:15:05,760 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 4309 transitions. Word has length 20 [2021-10-07 15:15:05,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:15:05,760 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 4309 transitions. [2021-10-07 15:15:05,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 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) [2021-10-07 15:15:05,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 4309 transitions. [2021-10-07 15:15:05,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 15:15:05,762 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:15:05,762 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:15:05,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-10-07 15:15:05,976 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,SelfDestructingSolverStorable78 [2021-10-07 15:15:05,976 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:15:05,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:15:05,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1866756832, now seen corresponding path program 28 times [2021-10-07 15:15:05,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:15:05,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899143201] [2021-10-07 15:15:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:15:05,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:15:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:15:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:15:07,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:15:07,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899143201] [2021-10-07 15:15:07,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899143201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:07,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984356366] [2021-10-07 15:15:07,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:15:07,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:07,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:15:07,153 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) [2021-10-07 15:15:07,154 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 [2021-10-07 15:15:09,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:15:09,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:15:09,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-07 15:15:09,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:15:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:15:10,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984356366] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:10,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:15:10,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 33 [2021-10-07 15:15:10,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480325377] [2021-10-07 15:15:10,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-07 15:15:10,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:15:10,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-07 15:15:10,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2021-10-07 15:15:10,863 INFO L87 Difference]: Start difference. First operand 1298 states and 4309 transitions. Second operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 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) [2021-10-07 15:15:15,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:15:15,055 INFO L93 Difference]: Finished difference Result 1790 states and 5915 transitions. [2021-10-07 15:15:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-07 15:15:15,055 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 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 20 [2021-10-07 15:15:15,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:15:15,059 INFO L225 Difference]: With dead ends: 1790 [2021-10-07 15:15:15,059 INFO L226 Difference]: Without dead ends: 1790 [2021-10-07 15:15:15,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 4223.4ms TimeCoverageRelationStatistics Valid=400, Invalid=4292, Unknown=0, NotChecked=0, Total=4692 [2021-10-07 15:15:15,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-10-07 15:15:15,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1548. [2021-10-07 15:15:15,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1546 states have (on average 3.486416558861578) internal successors, (5390), 1547 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 5390 transitions. [2021-10-07 15:15:15,095 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 5390 transitions. Word has length 20 [2021-10-07 15:15:15,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:15:15,096 INFO L470 AbstractCegarLoop]: Abstraction has 1548 states and 5390 transitions. [2021-10-07 15:15:15,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 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) [2021-10-07 15:15:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 5390 transitions. [2021-10-07 15:15:15,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:15:15,097 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:15:15,097 INFO L512 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:15:15,129 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 [2021-10-07 15:15:15,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-10-07 15:15:15,298 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:15:15,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:15:15,298 INFO L82 PathProgramCache]: Analyzing trace with hash -164938381, now seen corresponding path program 29 times [2021-10-07 15:15:15,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:15:15,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100295514] [2021-10-07 15:15:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:15:15,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:15:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:15:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:15:17,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:15:17,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100295514] [2021-10-07 15:15:17,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100295514] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:17,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993903439] [2021-10-07 15:15:17,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:15:17,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:17,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:15:17,513 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) [2021-10-07 15:15:17,514 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 [2021-10-07 15:15:19,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-07 15:15:19,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:15:19,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-07 15:15:19,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:15:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-07 15:15:20,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993903439] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:20,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:15:20,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 28 [2021-10-07 15:15:20,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810708344] [2021-10-07 15:15:20,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:15:20,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:15:20,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:15:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:15:20,805 INFO L87 Difference]: Start difference. First operand 1548 states and 5390 transitions. Second operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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) [2021-10-07 15:15:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:15:24,923 INFO L93 Difference]: Finished difference Result 1626 states and 5564 transitions. [2021-10-07 15:15:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-07 15:15:24,923 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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 21 [2021-10-07 15:15:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:15:24,926 INFO L225 Difference]: With dead ends: 1626 [2021-10-07 15:15:24,926 INFO L226 Difference]: Without dead ends: 1626 [2021-10-07 15:15:24,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 4970.1ms TimeCoverageRelationStatistics Valid=275, Invalid=2481, Unknown=0, NotChecked=0, Total=2756 [2021-10-07 15:15:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-10-07 15:15:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1548. [2021-10-07 15:15:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1546 states have (on average 3.486416558861578) internal successors, (5390), 1547 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 5390 transitions. [2021-10-07 15:15:24,952 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 5390 transitions. Word has length 21 [2021-10-07 15:15:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:15:24,953 INFO L470 AbstractCegarLoop]: Abstraction has 1548 states and 5390 transitions. [2021-10-07 15:15:24,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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) [2021-10-07 15:15:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 5390 transitions. [2021-10-07 15:15:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:15:24,954 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:15:24,954 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:15:24,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-10-07 15:15:25,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:25,155 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:15:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:15:25,155 INFO L82 PathProgramCache]: Analyzing trace with hash -164983548, now seen corresponding path program 30 times [2021-10-07 15:15:25,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:15:25,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776776492] [2021-10-07 15:15:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:15:25,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:15:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:15:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:15:32,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:15:32,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776776492] [2021-10-07 15:15:32,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776776492] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:32,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310221429] [2021-10-07 15:15:32,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:15:32,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:32,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:15:32,066 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) [2021-10-07 15:15:32,068 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 [2021-10-07 15:15:34,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-07 15:15:34,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:15:34,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 15:15:34,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:15:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-07 15:15:35,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310221429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:35,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:15:35,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 27 [2021-10-07 15:15:35,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685313387] [2021-10-07 15:15:35,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-07 15:15:35,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:15:35,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-07 15:15:35,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-10-07 15:15:35,347 INFO L87 Difference]: Start difference. First operand 1548 states and 5390 transitions. Second operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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) [2021-10-07 15:15:39,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:15:39,976 INFO L93 Difference]: Finished difference Result 1776 states and 5913 transitions. [2021-10-07 15:15:39,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-07 15:15:39,976 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 21 [2021-10-07 15:15:39,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:15:39,979 INFO L225 Difference]: With dead ends: 1776 [2021-10-07 15:15:39,980 INFO L226 Difference]: Without dead ends: 1770 [2021-10-07 15:15:39,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 5155.2ms TimeCoverageRelationStatistics Valid=301, Invalid=2669, Unknown=0, NotChecked=0, Total=2970 [2021-10-07 15:15:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2021-10-07 15:15:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1590. [2021-10-07 15:15:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1588 states have (on average 3.457178841309824) internal successors, (5490), 1589 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:40,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5490 transitions. [2021-10-07 15:15:40,009 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5490 transitions. Word has length 21 [2021-10-07 15:15:40,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:15:40,009 INFO L470 AbstractCegarLoop]: Abstraction has 1590 states and 5490 transitions. [2021-10-07 15:15:40,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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) [2021-10-07 15:15:40,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5490 transitions. [2021-10-07 15:15:40,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:15:40,011 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:15:40,011 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:15:40,044 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 [2021-10-07 15:15:40,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:40,212 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:15:40,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:15:40,212 INFO L82 PathProgramCache]: Analyzing trace with hash -123286750, now seen corresponding path program 31 times [2021-10-07 15:15:40,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:15:40,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685009758] [2021-10-07 15:15:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:15:40,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:15:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:15:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:15:41,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:15:41,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685009758] [2021-10-07 15:15:41,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685009758] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:41,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757248651] [2021-10-07 15:15:41,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:15:41,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:41,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:15:41,756 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) [2021-10-07 15:15:41,756 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 [2021-10-07 15:15:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:15:44,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-07 15:15:44,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:15:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:15:45,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757248651] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:45,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:15:45,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 31 [2021-10-07 15:15:45,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771512984] [2021-10-07 15:15:45,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-07 15:15:45,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:15:45,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-07 15:15:45,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=985, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 15:15:45,331 INFO L87 Difference]: Start difference. First operand 1590 states and 5490 transitions. Second operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 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) [2021-10-07 15:15:56,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:15:56,915 INFO L93 Difference]: Finished difference Result 2594 states and 8412 transitions. [2021-10-07 15:15:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-10-07 15:15:56,916 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 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 21 [2021-10-07 15:15:56,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:15:56,921 INFO L225 Difference]: With dead ends: 2594 [2021-10-07 15:15:56,921 INFO L226 Difference]: Without dead ends: 2594 [2021-10-07 15:15:56,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 8703.2ms TimeCoverageRelationStatistics Valid=873, Invalid=10047, Unknown=0, NotChecked=0, Total=10920 [2021-10-07 15:15:56,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2021-10-07 15:15:56,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 1886. [2021-10-07 15:15:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1884 states have (on average 3.5658174097664546) internal successors, (6718), 1885 states have internal predecessors, (6718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6718 transitions. [2021-10-07 15:15:56,971 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6718 transitions. Word has length 21 [2021-10-07 15:15:56,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:15:56,971 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 6718 transitions. [2021-10-07 15:15:56,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 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) [2021-10-07 15:15:56,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6718 transitions. [2021-10-07 15:15:56,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:15:56,973 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:15:56,973 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:15:57,004 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 [2021-10-07 15:15:57,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:57,173 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:15:57,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:15:57,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1071753059, now seen corresponding path program 42 times [2021-10-07 15:15:57,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:15:57,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955327224] [2021-10-07 15:15:57,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:15:57,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:15:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:15:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:15:58,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:15:58,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955327224] [2021-10-07 15:15:58,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955327224] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:58,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431716239] [2021-10-07 15:15:58,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:15:58,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:58,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:15:58,065 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) [2021-10-07 15:15:58,067 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 [2021-10-07 15:16:00,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:16:00,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:16:00,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-07 15:16:00,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:16:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:16:01,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431716239] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:01,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:16:01,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 31 [2021-10-07 15:16:01,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931531177] [2021-10-07 15:16:01,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-07 15:16:01,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:16:01,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-07 15:16:01,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 15:16:01,667 INFO L87 Difference]: Start difference. First operand 1886 states and 6718 transitions. Second operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 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) [2021-10-07 15:16:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:16:04,144 INFO L93 Difference]: Finished difference Result 2066 states and 7222 transitions. [2021-10-07 15:16:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-07 15:16:04,144 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 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 21 [2021-10-07 15:16:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:16:04,149 INFO L225 Difference]: With dead ends: 2066 [2021-10-07 15:16:04,149 INFO L226 Difference]: Without dead ends: 2066 [2021-10-07 15:16:04,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2816.3ms TimeCoverageRelationStatistics Valid=265, Invalid=3041, Unknown=0, NotChecked=0, Total=3306 [2021-10-07 15:16:04,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-10-07 15:16:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1892. [2021-10-07 15:16:04,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1890 states have (on average 3.568783068783069) internal successors, (6745), 1891 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:04,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6745 transitions. [2021-10-07 15:16:04,214 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6745 transitions. Word has length 21 [2021-10-07 15:16:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:16:04,214 INFO L470 AbstractCegarLoop]: Abstraction has 1892 states and 6745 transitions. [2021-10-07 15:16:04,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 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) [2021-10-07 15:16:04,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6745 transitions. [2021-10-07 15:16:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:16:04,215 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:16:04,215 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:16:04,248 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 [2021-10-07 15:16:04,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:04,416 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:16:04,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:16:04,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1071753060, now seen corresponding path program 32 times [2021-10-07 15:16:04,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:16:04,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566469646] [2021-10-07 15:16:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:16:04,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:16:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:16:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:05,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:16:05,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566469646] [2021-10-07 15:16:05,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566469646] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:05,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894888163] [2021-10-07 15:16:05,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:16:05,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:05,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:16:05,806 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) [2021-10-07 15:16:05,807 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 [2021-10-07 15:16:08,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:16:08,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:16:08,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-07 15:16:08,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:16:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:16:09,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894888163] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:09,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:16:09,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 31 [2021-10-07 15:16:09,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581373046] [2021-10-07 15:16:09,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-07 15:16:09,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:16:09,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-07 15:16:09,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 15:16:09,330 INFO L87 Difference]: Start difference. First operand 1892 states and 6745 transitions. Second operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 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) [2021-10-07 15:16:12,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:16:12,159 INFO L93 Difference]: Finished difference Result 2066 states and 7170 transitions. [2021-10-07 15:16:12,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-07 15:16:12,160 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 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 21 [2021-10-07 15:16:12,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:16:12,163 INFO L225 Difference]: With dead ends: 2066 [2021-10-07 15:16:12,164 INFO L226 Difference]: Without dead ends: 2066 [2021-10-07 15:16:12,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 3145.4ms TimeCoverageRelationStatistics Valid=305, Invalid=3117, Unknown=0, NotChecked=0, Total=3422 [2021-10-07 15:16:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-10-07 15:16:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1876. [2021-10-07 15:16:12,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1874 states have (on average 3.5715048025613663) internal successors, (6693), 1875 states have internal predecessors, (6693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:12,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 6693 transitions. [2021-10-07 15:16:12,218 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 6693 transitions. Word has length 21 [2021-10-07 15:16:12,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:16:12,218 INFO L470 AbstractCegarLoop]: Abstraction has 1876 states and 6693 transitions. [2021-10-07 15:16:12,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 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) [2021-10-07 15:16:12,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 6693 transitions. [2021-10-07 15:16:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:16:12,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:16:12,220 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:16:12,286 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 [2021-10-07 15:16:12,434 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,SelfDestructingSolverStorable84 [2021-10-07 15:16:12,435 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:16:12,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:16:12,435 INFO L82 PathProgramCache]: Analyzing trace with hash -230411551, now seen corresponding path program 43 times [2021-10-07 15:16:12,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:16:12,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101964668] [2021-10-07 15:16:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:16:12,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:16:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:16:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:13,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:16:13,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101964668] [2021-10-07 15:16:13,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101964668] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:13,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962370500] [2021-10-07 15:16:13,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:16:13,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:13,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:16:13,371 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) [2021-10-07 15:16:13,372 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 [2021-10-07 15:16:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:16:15,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-07 15:16:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:16:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:16:16,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962370500] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:16,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:16:16,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 31 [2021-10-07 15:16:16,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110493169] [2021-10-07 15:16:16,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-07 15:16:16,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:16:16,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-07 15:16:16,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 15:16:16,723 INFO L87 Difference]: Start difference. First operand 1876 states and 6693 transitions. Second operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 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) [2021-10-07 15:16:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:16:20,881 INFO L93 Difference]: Finished difference Result 3038 states and 10540 transitions. [2021-10-07 15:16:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-07 15:16:20,881 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 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 21 [2021-10-07 15:16:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:16:20,888 INFO L225 Difference]: With dead ends: 3038 [2021-10-07 15:16:20,888 INFO L226 Difference]: Without dead ends: 3038 [2021-10-07 15:16:20,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 3863.4ms TimeCoverageRelationStatistics Valid=400, Invalid=4712, Unknown=0, NotChecked=0, Total=5112 [2021-10-07 15:16:20,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2021-10-07 15:16:20,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 2102. [2021-10-07 15:16:20,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2100 states have (on average 3.6514285714285712) internal successors, (7668), 2101 states have internal predecessors, (7668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 7668 transitions. [2021-10-07 15:16:20,970 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 7668 transitions. Word has length 21 [2021-10-07 15:16:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:16:20,970 INFO L470 AbstractCegarLoop]: Abstraction has 2102 states and 7668 transitions. [2021-10-07 15:16:20,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 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) [2021-10-07 15:16:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 7668 transitions. [2021-10-07 15:16:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:16:20,973 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:16:20,973 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:16:21,023 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 [2021-10-07 15:16:21,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:21,187 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:16:21,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:16:21,187 INFO L82 PathProgramCache]: Analyzing trace with hash -230411550, now seen corresponding path program 33 times [2021-10-07 15:16:21,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:16:21,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682463003] [2021-10-07 15:16:21,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:16:21,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:16:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:16:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:23,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:16:23,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682463003] [2021-10-07 15:16:23,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682463003] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:23,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945914812] [2021-10-07 15:16:23,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:16:23,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:23,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:16:23,196 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:16:23,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-10-07 15:16:26,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:16:26,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:16:26,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-07 15:16:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:16:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:16:27,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945914812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:27,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:16:27,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 31 [2021-10-07 15:16:27,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812546771] [2021-10-07 15:16:27,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-07 15:16:27,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:16:27,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-07 15:16:27,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 15:16:27,538 INFO L87 Difference]: Start difference. First operand 2102 states and 7668 transitions. Second operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 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) [2021-10-07 15:16:30,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:16:30,234 INFO L93 Difference]: Finished difference Result 2258 states and 8066 transitions. [2021-10-07 15:16:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-07 15:16:30,234 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 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 21 [2021-10-07 15:16:30,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:16:30,238 INFO L225 Difference]: With dead ends: 2258 [2021-10-07 15:16:30,238 INFO L226 Difference]: Without dead ends: 2258 [2021-10-07 15:16:30,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 3409.9ms TimeCoverageRelationStatistics Valid=280, Invalid=3026, Unknown=0, NotChecked=0, Total=3306 [2021-10-07 15:16:30,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-10-07 15:16:30,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 2074. [2021-10-07 15:16:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2072 states have (on average 3.6573359073359075) internal successors, (7578), 2073 states have internal predecessors, (7578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 7578 transitions. [2021-10-07 15:16:30,286 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 7578 transitions. Word has length 21 [2021-10-07 15:16:30,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:16:30,286 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 7578 transitions. [2021-10-07 15:16:30,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 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) [2021-10-07 15:16:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 7578 transitions. [2021-10-07 15:16:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:16:30,288 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:16:30,288 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:16:30,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-10-07 15:16:30,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-10-07 15:16:30,489 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:16:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:16:30,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1060789010, now seen corresponding path program 44 times [2021-10-07 15:16:30,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:16:30,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318426758] [2021-10-07 15:16:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:16:30,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:16:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:16:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:31,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:16:31,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318426758] [2021-10-07 15:16:31,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318426758] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:31,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369154390] [2021-10-07 15:16:31,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:16:31,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:31,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:16:31,361 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:16:31,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-10-07 15:16:33,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:16:33,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:16:33,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-07 15:16:33,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:16:34,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:16:34,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:16:34,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:16:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:35,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369154390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:35,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:16:35,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 35 [2021-10-07 15:16:35,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553492758] [2021-10-07 15:16:35,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 15:16:35,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:16:35,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 15:16:35,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:16:35,530 INFO L87 Difference]: Start difference. First operand 2074 states and 7578 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:16:51,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:16:51,338 INFO L93 Difference]: Finished difference Result 7956 states and 28839 transitions. [2021-10-07 15:16:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-10-07 15:16:51,339 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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 21 [2021-10-07 15:16:51,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:16:51,359 INFO L225 Difference]: With dead ends: 7956 [2021-10-07 15:16:51,359 INFO L226 Difference]: Without dead ends: 7956 [2021-10-07 15:16:51,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7922 ImplicationChecksByTransitivity, 12475.8ms TimeCoverageRelationStatistics Valid=3220, Invalid=19430, Unknown=0, NotChecked=0, Total=22650 [2021-10-07 15:16:51,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7956 states. [2021-10-07 15:16:51,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7956 to 5236. [2021-10-07 15:16:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5236 states, 5234 states have (on average 4.028085594191823) internal successors, (21083), 5235 states have internal predecessors, (21083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 21083 transitions. [2021-10-07 15:16:51,516 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 21083 transitions. Word has length 21 [2021-10-07 15:16:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:16:51,517 INFO L470 AbstractCegarLoop]: Abstraction has 5236 states and 21083 transitions. [2021-10-07 15:16:51,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:16:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 21083 transitions. [2021-10-07 15:16:51,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:16:51,519 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:16:51,519 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:16:51,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-10-07 15:16:51,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-10-07 15:16:51,720 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:16:51,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:16:51,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1060789011, now seen corresponding path program 34 times [2021-10-07 15:16:51,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:16:51,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128077628] [2021-10-07 15:16:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:16:51,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:16:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:16:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:52,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:16:52,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128077628] [2021-10-07 15:16:52,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128077628] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:52,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207378186] [2021-10-07 15:16:52,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:16:52,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:52,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:16:52,304 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:16:52,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-10-07 15:16:54,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:16:54,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:16:54,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-07 15:16:54,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:16:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:56,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207378186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:56,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:16:56,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-07 15:16:56,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074717583] [2021-10-07 15:16:56,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-07 15:16:56,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:16:56,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-07 15:16:56,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:16:56,340 INFO L87 Difference]: Start difference. First operand 5236 states and 21083 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:16:58,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:16:58,321 INFO L93 Difference]: Finished difference Result 5884 states and 23071 transitions. [2021-10-07 15:16:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-07 15:16:58,322 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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 21 [2021-10-07 15:16:58,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:16:58,335 INFO L225 Difference]: With dead ends: 5884 [2021-10-07 15:16:58,336 INFO L226 Difference]: Without dead ends: 5860 [2021-10-07 15:16:58,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 2215.1ms TimeCoverageRelationStatistics Valid=263, Invalid=2599, Unknown=0, NotChecked=0, Total=2862 [2021-10-07 15:16:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5860 states. [2021-10-07 15:16:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5860 to 5558. [2021-10-07 15:16:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5558 states, 5556 states have (on average 4.017278617710583) internal successors, (22320), 5557 states have internal predecessors, (22320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 22320 transitions. [2021-10-07 15:16:58,456 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 22320 transitions. Word has length 21 [2021-10-07 15:16:58,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:16:58,457 INFO L470 AbstractCegarLoop]: Abstraction has 5558 states and 22320 transitions. [2021-10-07 15:16:58,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:16:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 22320 transitions. [2021-10-07 15:16:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:16:58,458 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:16:58,458 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:16:58,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-10-07 15:16:58,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:58,659 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:16:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:16:58,660 INFO L82 PathProgramCache]: Analyzing trace with hash -241375600, now seen corresponding path program 45 times [2021-10-07 15:16:58,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:16:58,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142155886] [2021-10-07 15:16:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:16:58,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:16:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:17:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:01,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:17:01,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142155886] [2021-10-07 15:17:01,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142155886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:01,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26494436] [2021-10-07 15:17:01,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:17:01,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:01,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:17:01,053 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:17:01,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-10-07 15:17:04,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:17:04,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:17:04,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-07 15:17:04,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:17:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-07 15:17:05,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26494436] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:05,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:17:05,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 29 [2021-10-07 15:17:05,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234962526] [2021-10-07 15:17:05,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:17:05,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:17:05,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:17:05,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:17:05,107 INFO L87 Difference]: Start difference. First operand 5558 states and 22320 transitions. Second operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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) [2021-10-07 15:17:11,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:17:11,290 INFO L93 Difference]: Finished difference Result 8256 states and 31415 transitions. [2021-10-07 15:17:11,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-07 15:17:11,291 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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 21 [2021-10-07 15:17:11,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:17:11,312 INFO L225 Difference]: With dead ends: 8256 [2021-10-07 15:17:11,313 INFO L226 Difference]: Without dead ends: 8256 [2021-10-07 15:17:11,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 5256.2ms TimeCoverageRelationStatistics Valid=307, Invalid=3599, Unknown=0, NotChecked=0, Total=3906 [2021-10-07 15:17:11,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8256 states. [2021-10-07 15:17:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8256 to 5716. [2021-10-07 15:17:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5716 states, 5714 states have (on average 4.005425271263563) internal successors, (22887), 5715 states have internal predecessors, (22887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5716 states to 5716 states and 22887 transitions. [2021-10-07 15:17:11,464 INFO L78 Accepts]: Start accepts. Automaton has 5716 states and 22887 transitions. Word has length 21 [2021-10-07 15:17:11,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:17:11,464 INFO L470 AbstractCegarLoop]: Abstraction has 5716 states and 22887 transitions. [2021-10-07 15:17:11,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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) [2021-10-07 15:17:11,464 INFO L276 IsEmpty]: Start isEmpty. Operand 5716 states and 22887 transitions. [2021-10-07 15:17:11,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:17:11,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:17:11,466 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:17:11,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-10-07 15:17:11,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:11,666 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:17:11,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:17:11,667 INFO L82 PathProgramCache]: Analyzing trace with hash -241375599, now seen corresponding path program 35 times [2021-10-07 15:17:11,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:17:11,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201264637] [2021-10-07 15:17:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:17:11,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:17:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:17:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:12,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:17:12,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201264637] [2021-10-07 15:17:12,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201264637] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:12,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227078836] [2021-10-07 15:17:12,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:17:12,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:12,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:17:12,429 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:17:12,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-10-07 15:17:15,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:17:15,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:17:15,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-07 15:17:15,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:17:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:16,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227078836] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:16,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:17:16,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-07 15:17:16,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649273319] [2021-10-07 15:17:16,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-07 15:17:16,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:17:16,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-07 15:17:16,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:17:16,663 INFO L87 Difference]: Start difference. First operand 5716 states and 22887 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:17:19,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:17:19,137 INFO L93 Difference]: Finished difference Result 3114 states and 11338 transitions. [2021-10-07 15:17:19,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-07 15:17:19,138 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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 21 [2021-10-07 15:17:19,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:17:19,144 INFO L225 Difference]: With dead ends: 3114 [2021-10-07 15:17:19,145 INFO L226 Difference]: Without dead ends: 3114 [2021-10-07 15:17:19,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 2893.8ms TimeCoverageRelationStatistics Valid=469, Invalid=2837, Unknown=0, NotChecked=0, Total=3306 [2021-10-07 15:17:19,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3114 states. [2021-10-07 15:17:19,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3114 to 2452. [2021-10-07 15:17:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2450 states have (on average 3.6983673469387757) internal successors, (9061), 2451 states have internal predecessors, (9061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 9061 transitions. [2021-10-07 15:17:19,196 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 9061 transitions. Word has length 21 [2021-10-07 15:17:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:17:19,196 INFO L470 AbstractCegarLoop]: Abstraction has 2452 states and 9061 transitions. [2021-10-07 15:17:19,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:17:19,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 9061 transitions. [2021-10-07 15:17:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:17:19,197 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:17:19,198 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:17:19,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-10-07 15:17:19,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:19,398 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:17:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:17:19,399 INFO L82 PathProgramCache]: Analyzing trace with hash -283380909, now seen corresponding path program 36 times [2021-10-07 15:17:19,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:17:19,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362942024] [2021-10-07 15:17:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:17:19,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:17:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:17:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:20,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:17:20,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362942024] [2021-10-07 15:17:20,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362942024] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:20,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463898061] [2021-10-07 15:17:20,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:17:20,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:20,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:17:20,275 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:17:20,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-10-07 15:17:23,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:17:23,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:17:23,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-07 15:17:23,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:17:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:24,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463898061] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:24,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:17:24,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-07 15:17:24,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298237247] [2021-10-07 15:17:24,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-07 15:17:24,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:17:24,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-07 15:17:24,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:17:24,861 INFO L87 Difference]: Start difference. First operand 2452 states and 9061 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:17:30,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:17:30,591 INFO L93 Difference]: Finished difference Result 1372 states and 4011 transitions. [2021-10-07 15:17:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-07 15:17:30,592 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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 21 [2021-10-07 15:17:30,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:17:30,594 INFO L225 Difference]: With dead ends: 1372 [2021-10-07 15:17:30,594 INFO L226 Difference]: Without dead ends: 1224 [2021-10-07 15:17:30,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 6073.0ms TimeCoverageRelationStatistics Valid=591, Invalid=4959, Unknown=0, NotChecked=0, Total=5550 [2021-10-07 15:17:30,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-10-07 15:17:30,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1000. [2021-10-07 15:17:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 998 states have (on average 3.30561122244489) internal successors, (3299), 999 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 3299 transitions. [2021-10-07 15:17:30,611 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 3299 transitions. Word has length 21 [2021-10-07 15:17:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:17:30,611 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 3299 transitions. [2021-10-07 15:17:30,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:17:30,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 3299 transitions. [2021-10-07 15:17:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:17:30,612 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:17:30,612 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:17:30,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-10-07 15:17:30,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:30,813 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:17:30,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:17:30,813 INFO L82 PathProgramCache]: Analyzing trace with hash -284735920, now seen corresponding path program 46 times [2021-10-07 15:17:30,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:17:30,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46564366] [2021-10-07 15:17:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:17:30,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:17:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:17:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:32,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:17:32,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46564366] [2021-10-07 15:17:32,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46564366] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:32,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903418388] [2021-10-07 15:17:32,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:17:32,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:32,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:17:32,363 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:17:32,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-10-07 15:17:35,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:17:35,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:17:35,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-07 15:17:35,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:17:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:17:36,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903418388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:36,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:17:36,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 32 [2021-10-07 15:17:36,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314616315] [2021-10-07 15:17:36,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-07 15:17:36,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:17:36,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-07 15:17:36,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 15:17:36,296 INFO L87 Difference]: Start difference. First operand 1000 states and 3299 transitions. Second operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 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) [2021-10-07 15:17:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:17:38,583 INFO L93 Difference]: Finished difference Result 1140 states and 3675 transitions. [2021-10-07 15:17:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:17:38,584 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 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 21 [2021-10-07 15:17:38,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:17:38,586 INFO L225 Difference]: With dead ends: 1140 [2021-10-07 15:17:38,586 INFO L226 Difference]: Without dead ends: 1138 [2021-10-07 15:17:38,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 2537.5ms TimeCoverageRelationStatistics Valid=174, Invalid=2082, Unknown=0, NotChecked=0, Total=2256 [2021-10-07 15:17:38,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-10-07 15:17:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1066. [2021-10-07 15:17:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1064 states have (on average 3.327067669172932) internal successors, (3540), 1065 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:38,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 3540 transitions. [2021-10-07 15:17:38,603 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 3540 transitions. Word has length 21 [2021-10-07 15:17:38,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:17:38,603 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 3540 transitions. [2021-10-07 15:17:38,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 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) [2021-10-07 15:17:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 3540 transitions. [2021-10-07 15:17:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:17:38,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:17:38,604 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:17:38,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-10-07 15:17:38,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:38,805 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:17:38,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:17:38,806 INFO L82 PathProgramCache]: Analyzing trace with hash -284735919, now seen corresponding path program 37 times [2021-10-07 15:17:38,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:17:38,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593545245] [2021-10-07 15:17:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:17:38,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:17:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:17:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:39,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:17:39,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593545245] [2021-10-07 15:17:39,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593545245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:39,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980500237] [2021-10-07 15:17:39,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:17:39,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:39,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:17:39,491 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:17:39,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-10-07 15:17:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:17:42,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-07 15:17:42,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:17:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:43,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980500237] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:43,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:17:43,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-07 15:17:43,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289710336] [2021-10-07 15:17:43,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-07 15:17:43,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:17:43,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-07 15:17:43,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:17:43,782 INFO L87 Difference]: Start difference. First operand 1066 states and 3540 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:17:44,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:17:44,795 INFO L93 Difference]: Finished difference Result 1086 states and 3556 transitions. [2021-10-07 15:17:44,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 15:17:44,795 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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 21 [2021-10-07 15:17:44,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:17:44,797 INFO L225 Difference]: With dead ends: 1086 [2021-10-07 15:17:44,797 INFO L226 Difference]: Without dead ends: 1060 [2021-10-07 15:17:44,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1716.2ms TimeCoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2021-10-07 15:17:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-10-07 15:17:44,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1044. [2021-10-07 15:17:44,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1042 states have (on average 3.338771593090211) internal successors, (3479), 1043 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:44,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3479 transitions. [2021-10-07 15:17:44,816 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3479 transitions. Word has length 21 [2021-10-07 15:17:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:17:44,817 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 3479 transitions. [2021-10-07 15:17:44,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:17:44,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3479 transitions. [2021-10-07 15:17:44,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:17:44,818 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:17:44,818 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:17:44,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-10-07 15:17:45,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:45,019 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:17:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:17:45,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1953772846, now seen corresponding path program 47 times [2021-10-07 15:17:45,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:17:45,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536761178] [2021-10-07 15:17:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:17:45,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:17:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:17:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:46,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:17:46,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536761178] [2021-10-07 15:17:46,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536761178] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:46,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033406253] [2021-10-07 15:17:46,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:17:46,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:46,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:17:46,185 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:17:46,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-10-07 15:17:49,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:17:49,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:17:49,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-07 15:17:49,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:17:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:50,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033406253] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:50,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:17:50,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 35 [2021-10-07 15:17:50,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290033411] [2021-10-07 15:17:50,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 15:17:50,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:17:50,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 15:17:50,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:17:50,530 INFO L87 Difference]: Start difference. First operand 1044 states and 3479 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:17:53,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:17:53,035 INFO L93 Difference]: Finished difference Result 1082 states and 3556 transitions. [2021-10-07 15:17:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 15:17:53,035 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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 21 [2021-10-07 15:17:53,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:17:53,037 INFO L225 Difference]: With dead ends: 1082 [2021-10-07 15:17:53,037 INFO L226 Difference]: Without dead ends: 1082 [2021-10-07 15:17:53,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 3162.9ms TimeCoverageRelationStatistics Valid=259, Invalid=2933, Unknown=0, NotChecked=0, Total=3192 [2021-10-07 15:17:53,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-10-07 15:17:53,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1054. [2021-10-07 15:17:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1052 states have (on average 3.332699619771863) internal successors, (3506), 1053 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:53,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3506 transitions. [2021-10-07 15:17:53,058 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3506 transitions. Word has length 21 [2021-10-07 15:17:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:17:53,058 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 3506 transitions. [2021-10-07 15:17:53,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:17:53,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3506 transitions. [2021-10-07 15:17:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:17:53,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:17:53,060 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:17:53,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-10-07 15:17:53,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:53,265 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:17:53,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:17:53,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1953772845, now seen corresponding path program 38 times [2021-10-07 15:17:53,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:17:53,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039386114] [2021-10-07 15:17:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:17:53,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:17:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:17:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:53,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:17:53,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039386114] [2021-10-07 15:17:53,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039386114] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:53,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650813742] [2021-10-07 15:17:53,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:17:53,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:53,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:17:53,875 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:17:53,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-10-07 15:17:56,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:17:56,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:17:56,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-07 15:17:56,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:17:57,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:17:57,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:17:57,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:17:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:58,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650813742] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:58,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:17:58,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 35 [2021-10-07 15:17:58,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809161795] [2021-10-07 15:17:58,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 15:17:58,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:17:58,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 15:17:58,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:17:58,379 INFO L87 Difference]: Start difference. First operand 1054 states and 3506 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:17:59,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:17:59,621 INFO L93 Difference]: Finished difference Result 1094 states and 3572 transitions. [2021-10-07 15:17:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:17:59,622 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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 21 [2021-10-07 15:17:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:17:59,624 INFO L225 Difference]: With dead ends: 1094 [2021-10-07 15:17:59,624 INFO L226 Difference]: Without dead ends: 1074 [2021-10-07 15:17:59,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1911.1ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-10-07 15:17:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-10-07 15:17:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1046. [2021-10-07 15:17:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1044 states have (on average 3.335249042145594) internal successors, (3482), 1045 states have internal predecessors, (3482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3482 transitions. [2021-10-07 15:17:59,642 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3482 transitions. Word has length 21 [2021-10-07 15:17:59,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:17:59,642 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 3482 transitions. [2021-10-07 15:17:59,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:17:59,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3482 transitions. [2021-10-07 15:17:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:17:59,643 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:17:59,644 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:17:59,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-10-07 15:17:59,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-10-07 15:17:59,844 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:17:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:17:59,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1995778156, now seen corresponding path program 48 times [2021-10-07 15:17:59,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:17:59,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296589448] [2021-10-07 15:17:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:17:59,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:17:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:01,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:01,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296589448] [2021-10-07 15:18:01,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296589448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:01,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155589511] [2021-10-07 15:18:01,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:18:01,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:01,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:01,214 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:01,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-10-07 15:18:04,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:18:04,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:18:04,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-07 15:18:04,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:18:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:18:05,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155589511] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:05,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:18:05,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 32 [2021-10-07 15:18:05,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038202289] [2021-10-07 15:18:05,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-07 15:18:05,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:18:05,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-07 15:18:05,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 15:18:05,837 INFO L87 Difference]: Start difference. First operand 1046 states and 3482 transitions. Second operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2021-10-07 15:18:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:18:08,544 INFO L93 Difference]: Finished difference Result 1152 states and 3667 transitions. [2021-10-07 15:18:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 15:18:08,545 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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 21 [2021-10-07 15:18:08,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:18:08,547 INFO L225 Difference]: With dead ends: 1152 [2021-10-07 15:18:08,547 INFO L226 Difference]: Without dead ends: 1146 [2021-10-07 15:18:08,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 3128.5ms TimeCoverageRelationStatistics Valid=288, Invalid=2262, Unknown=0, NotChecked=0, Total=2550 [2021-10-07 15:18:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-10-07 15:18:08,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1054. [2021-10-07 15:18:08,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1052 states have (on average 3.326996197718631) internal successors, (3500), 1053 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:08,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3500 transitions. [2021-10-07 15:18:08,565 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3500 transitions. Word has length 21 [2021-10-07 15:18:08,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:18:08,565 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 3500 transitions. [2021-10-07 15:18:08,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2021-10-07 15:18:08,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3500 transitions. [2021-10-07 15:18:08,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:18:08,566 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:18:08,566 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:18:08,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-10-07 15:18:08,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:08,769 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:18:08,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:18:08,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1995778155, now seen corresponding path program 39 times [2021-10-07 15:18:08,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:18:08,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768365205] [2021-10-07 15:18:08,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:18:08,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:18:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:09,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:09,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768365205] [2021-10-07 15:18:09,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768365205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:09,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102999014] [2021-10-07 15:18:09,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:18:09,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:09,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:09,446 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:09,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-10-07 15:18:12,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:18:12,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:18:12,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 15:18:12,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:18:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-07 15:18:13,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102999014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:13,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:18:13,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 28 [2021-10-07 15:18:13,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538751310] [2021-10-07 15:18:13,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:18:13,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:18:13,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:18:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:18:13,297 INFO L87 Difference]: Start difference. First operand 1054 states and 3500 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:18:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:18:16,146 INFO L93 Difference]: Finished difference Result 1198 states and 3826 transitions. [2021-10-07 15:18:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-07 15:18:16,146 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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 21 [2021-10-07 15:18:16,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:18:16,148 INFO L225 Difference]: With dead ends: 1198 [2021-10-07 15:18:16,148 INFO L226 Difference]: Without dead ends: 1186 [2021-10-07 15:18:16,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 2406.6ms TimeCoverageRelationStatistics Valid=263, Invalid=2929, Unknown=0, NotChecked=0, Total=3192 [2021-10-07 15:18:16,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-10-07 15:18:16,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1096. [2021-10-07 15:18:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1094 states have (on average 3.33363802559415) internal successors, (3647), 1095 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:16,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3647 transitions. [2021-10-07 15:18:16,166 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3647 transitions. Word has length 21 [2021-10-07 15:18:16,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:18:16,166 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 3647 transitions. [2021-10-07 15:18:16,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-10-07 15:18:16,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3647 transitions. [2021-10-07 15:18:16,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:18:16,167 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:18:16,167 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:18:16,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-10-07 15:18:16,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-10-07 15:18:16,368 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:18:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:18:16,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1997133166, now seen corresponding path program 49 times [2021-10-07 15:18:16,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:18:16,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341347412] [2021-10-07 15:18:16,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:18:16,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:18:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:17,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:17,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341347412] [2021-10-07 15:18:17,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341347412] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:17,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833768225] [2021-10-07 15:18:17,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:18:17,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:17,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:17,342 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:17,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-10-07 15:18:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:20,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-07 15:18:20,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:18:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:21,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833768225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:21,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:18:21,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-07 15:18:21,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555935738] [2021-10-07 15:18:21,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-07 15:18:21,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:18:21,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-07 15:18:21,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:18:21,712 INFO L87 Difference]: Start difference. First operand 1096 states and 3647 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:18:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:18:23,968 INFO L93 Difference]: Finished difference Result 1268 states and 3947 transitions. [2021-10-07 15:18:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-07 15:18:23,969 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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 21 [2021-10-07 15:18:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:18:23,971 INFO L225 Difference]: With dead ends: 1268 [2021-10-07 15:18:23,971 INFO L226 Difference]: Without dead ends: 1262 [2021-10-07 15:18:23,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 2735.4ms TimeCoverageRelationStatistics Valid=492, Invalid=2930, Unknown=0, NotChecked=0, Total=3422 [2021-10-07 15:18:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-10-07 15:18:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1098. [2021-10-07 15:18:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1096 states have (on average 3.3302919708029197) internal successors, (3650), 1097 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 3650 transitions. [2021-10-07 15:18:23,989 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 3650 transitions. Word has length 21 [2021-10-07 15:18:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:18:23,989 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 3650 transitions. [2021-10-07 15:18:23,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:18:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 3650 transitions. [2021-10-07 15:18:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:18:23,990 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:18:23,990 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:18:24,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-10-07 15:18:24,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:24,191 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:18:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:18:24,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1997133165, now seen corresponding path program 40 times [2021-10-07 15:18:24,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:18:24,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368682618] [2021-10-07 15:18:24,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:18:24,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:18:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:24,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:24,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368682618] [2021-10-07 15:18:24,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368682618] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:24,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99145780] [2021-10-07 15:18:24,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:18:24,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:24,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:24,778 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:24,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-10-07 15:18:27,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:18:27,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:18:27,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-07 15:18:27,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:18:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:18:28,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99145780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:28,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:18:28,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 30 [2021-10-07 15:18:28,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001292117] [2021-10-07 15:18:28,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 15:18:28,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:18:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 15:18:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:18:28,840 INFO L87 Difference]: Start difference. First operand 1098 states and 3650 transitions. Second operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 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) [2021-10-07 15:18:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:18:31,131 INFO L93 Difference]: Finished difference Result 1216 states and 3911 transitions. [2021-10-07 15:18:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:18:31,132 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 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 21 [2021-10-07 15:18:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:18:31,134 INFO L225 Difference]: With dead ends: 1216 [2021-10-07 15:18:31,134 INFO L226 Difference]: Without dead ends: 1202 [2021-10-07 15:18:31,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 2298.5ms TimeCoverageRelationStatistics Valid=228, Invalid=2424, Unknown=0, NotChecked=0, Total=2652 [2021-10-07 15:18:31,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-10-07 15:18:31,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1120. [2021-10-07 15:18:31,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1118 states have (on average 3.3461538461538463) internal successors, (3741), 1119 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3741 transitions. [2021-10-07 15:18:31,152 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3741 transitions. Word has length 21 [2021-10-07 15:18:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:18:31,152 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 3741 transitions. [2021-10-07 15:18:31,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 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) [2021-10-07 15:18:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3741 transitions. [2021-10-07 15:18:31,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:18:31,153 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:18:31,154 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:18:31,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-10-07 15:18:31,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-10-07 15:18:31,354 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:18:31,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:18:31,355 INFO L82 PathProgramCache]: Analyzing trace with hash 995669520, now seen corresponding path program 50 times [2021-10-07 15:18:31,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:18:31,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347337233] [2021-10-07 15:18:31,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:18:31,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:18:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:32,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:32,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347337233] [2021-10-07 15:18:32,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347337233] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:32,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103475933] [2021-10-07 15:18:32,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:18:32,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:32,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:32,227 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:32,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-10-07 15:18:35,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:18:35,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:18:35,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-07 15:18:35,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:18:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:36,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103475933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:36,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:18:36,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-07 15:18:36,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456526979] [2021-10-07 15:18:36,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-07 15:18:36,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:18:36,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-07 15:18:36,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:18:36,609 INFO L87 Difference]: Start difference. First operand 1120 states and 3741 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:18:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:18:37,819 INFO L93 Difference]: Finished difference Result 1158 states and 3806 transitions. [2021-10-07 15:18:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:18:37,819 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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 21 [2021-10-07 15:18:37,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:18:37,822 INFO L225 Difference]: With dead ends: 1158 [2021-10-07 15:18:37,822 INFO L226 Difference]: Without dead ends: 1152 [2021-10-07 15:18:37,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1800.2ms TimeCoverageRelationStatistics Valid=225, Invalid=1845, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 15:18:37,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-10-07 15:18:37,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1120. [2021-10-07 15:18:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1118 states have (on average 3.3461538461538463) internal successors, (3741), 1119 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3741 transitions. [2021-10-07 15:18:37,839 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3741 transitions. Word has length 21 [2021-10-07 15:18:37,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:18:37,839 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 3741 transitions. [2021-10-07 15:18:37,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:18:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3741 transitions. [2021-10-07 15:18:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:18:37,840 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:18:37,840 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:18:37,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-10-07 15:18:38,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:38,042 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:18:38,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:18:38,043 INFO L82 PathProgramCache]: Analyzing trace with hash 995669521, now seen corresponding path program 41 times [2021-10-07 15:18:38,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:18:38,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298537242] [2021-10-07 15:18:38,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:18:38,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:18:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:39,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:39,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298537242] [2021-10-07 15:18:39,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298537242] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:39,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627993968] [2021-10-07 15:18:39,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:18:39,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:39,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:39,760 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:39,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-10-07 15:18:42,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:18:42,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:18:42,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-07 15:18:42,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:18:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:44,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627993968] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:44,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:18:44,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 35 [2021-10-07 15:18:44,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942181561] [2021-10-07 15:18:44,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 15:18:44,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:18:44,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 15:18:44,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:18:44,828 INFO L87 Difference]: Start difference. First operand 1120 states and 3741 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:18:54,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:18:54,161 INFO L93 Difference]: Finished difference Result 1156 states and 3803 transitions. [2021-10-07 15:18:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 15:18:54,162 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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 21 [2021-10-07 15:18:54,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:18:54,164 INFO L225 Difference]: With dead ends: 1156 [2021-10-07 15:18:54,164 INFO L226 Difference]: Without dead ends: 1144 [2021-10-07 15:18:54,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 8810.1ms TimeCoverageRelationStatistics Valid=297, Invalid=3243, Unknown=0, NotChecked=0, Total=3540 [2021-10-07 15:18:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-10-07 15:18:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1122. [2021-10-07 15:18:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1120 states have (on average 3.344642857142857) internal successors, (3746), 1121 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3746 transitions. [2021-10-07 15:18:54,182 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3746 transitions. Word has length 21 [2021-10-07 15:18:54,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:18:54,182 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 3746 transitions. [2021-10-07 15:18:54,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:18:54,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3746 transitions. [2021-10-07 15:18:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:18:54,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:18:54,183 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:18:54,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-10-07 15:18:54,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-10-07 15:18:54,384 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:18:54,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:18:54,385 INFO L82 PathProgramCache]: Analyzing trace with hash 953664210, now seen corresponding path program 51 times [2021-10-07 15:18:54,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:18:54,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616039196] [2021-10-07 15:18:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:18:54,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:18:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:55,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:55,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616039196] [2021-10-07 15:18:55,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616039196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:55,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353732390] [2021-10-07 15:18:55,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:18:55,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:55,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:55,527 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:55,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-10-07 15:18:59,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:18:59,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:18:59,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-07 15:18:59,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:19:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:00,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353732390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:00,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:19:00,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 35 [2021-10-07 15:19:00,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526291065] [2021-10-07 15:19:00,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 15:19:00,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:19:00,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 15:19:00,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:19:00,926 INFO L87 Difference]: Start difference. First operand 1122 states and 3746 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:19:03,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:19:03,902 INFO L93 Difference]: Finished difference Result 1140 states and 3771 transitions. [2021-10-07 15:19:03,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 15:19:03,902 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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 21 [2021-10-07 15:19:03,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:19:03,904 INFO L225 Difference]: With dead ends: 1140 [2021-10-07 15:19:03,904 INFO L226 Difference]: Without dead ends: 1132 [2021-10-07 15:19:03,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 3638.3ms TimeCoverageRelationStatistics Valid=307, Invalid=2773, Unknown=0, NotChecked=0, Total=3080 [2021-10-07 15:19:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-10-07 15:19:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1120. [2021-10-07 15:19:03,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1118 states have (on average 3.3443649373881934) internal successors, (3739), 1119 states have internal predecessors, (3739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3739 transitions. [2021-10-07 15:19:03,921 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3739 transitions. Word has length 21 [2021-10-07 15:19:03,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:19:03,921 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 3739 transitions. [2021-10-07 15:19:03,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:19:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3739 transitions. [2021-10-07 15:19:03,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:19:03,922 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:19:03,922 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:19:03,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-10-07 15:19:04,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:04,123 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:19:04,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:19:04,124 INFO L82 PathProgramCache]: Analyzing trace with hash 953620500, now seen corresponding path program 52 times [2021-10-07 15:19:04,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:19:04,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506245552] [2021-10-07 15:19:04,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:19:04,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:19:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:04,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:19:04,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506245552] [2021-10-07 15:19:04,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506245552] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:04,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247533855] [2021-10-07 15:19:04,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:19:04,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:04,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:19:04,814 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:19:04,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-10-07 15:19:07,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:19:07,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:19:07,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-07 15:19:07,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:19:08,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:19:08,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:19:08,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-07 15:19:08,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:19:08,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-07 15:19:08,415 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:19:08,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-10-07 15:19:08,507 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:19:08,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-10-07 15:19:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:09,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247533855] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:09,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:19:09,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 35 [2021-10-07 15:19:09,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999553252] [2021-10-07 15:19:09,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 15:19:09,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:19:09,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 15:19:09,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:19:09,731 INFO L87 Difference]: Start difference. First operand 1120 states and 3739 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:19:11,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:19:11,228 INFO L93 Difference]: Finished difference Result 1220 states and 3919 transitions. [2021-10-07 15:19:11,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 15:19:11,228 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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 21 [2021-10-07 15:19:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:19:11,230 INFO L225 Difference]: With dead ends: 1220 [2021-10-07 15:19:11,230 INFO L226 Difference]: Without dead ends: 1206 [2021-10-07 15:19:11,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 2019.8ms TimeCoverageRelationStatistics Valid=330, Invalid=2640, Unknown=0, NotChecked=0, Total=2970 [2021-10-07 15:19:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-10-07 15:19:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1112. [2021-10-07 15:19:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1110 states have (on average 3.355855855855856) internal successors, (3725), 1111 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3725 transitions. [2021-10-07 15:19:11,248 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3725 transitions. Word has length 21 [2021-10-07 15:19:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:19:11,248 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3725 transitions. [2021-10-07 15:19:11,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:19:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3725 transitions. [2021-10-07 15:19:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:19:11,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:19:11,249 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:19:11,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-10-07 15:19:11,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-10-07 15:19:11,450 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:19:11,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:19:11,450 INFO L82 PathProgramCache]: Analyzing trace with hash 796487376, now seen corresponding path program 53 times [2021-10-07 15:19:11,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:19:11,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284245494] [2021-10-07 15:19:11,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:19:11,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:19:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:12,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:19:12,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284245494] [2021-10-07 15:19:12,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284245494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:12,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014711931] [2021-10-07 15:19:12,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:19:12,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:12,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:19:12,502 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:19:12,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-10-07 15:19:15,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:19:15,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:19:15,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-07 15:19:15,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:19:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:17,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014711931] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:17,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:19:17,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-07 15:19:17,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747257710] [2021-10-07 15:19:17,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-07 15:19:17,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:19:17,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-07 15:19:17,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:19:17,113 INFO L87 Difference]: Start difference. First operand 1112 states and 3725 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:19:19,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:19:19,381 INFO L93 Difference]: Finished difference Result 1146 states and 3792 transitions. [2021-10-07 15:19:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:19:19,381 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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 21 [2021-10-07 15:19:19,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:19:19,384 INFO L225 Difference]: With dead ends: 1146 [2021-10-07 15:19:19,384 INFO L226 Difference]: Without dead ends: 1146 [2021-10-07 15:19:19,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 2660.5ms TimeCoverageRelationStatistics Valid=241, Invalid=2729, Unknown=0, NotChecked=0, Total=2970 [2021-10-07 15:19:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-10-07 15:19:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1120. [2021-10-07 15:19:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1118 states have (on average 3.351520572450805) internal successors, (3747), 1119 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3747 transitions. [2021-10-07 15:19:19,409 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3747 transitions. Word has length 21 [2021-10-07 15:19:19,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:19:19,409 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 3747 transitions. [2021-10-07 15:19:19,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:19:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3747 transitions. [2021-10-07 15:19:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:19:19,410 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:19:19,410 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:19:19,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-10-07 15:19:19,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:19,623 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:19:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:19:19,624 INFO L82 PathProgramCache]: Analyzing trace with hash 796487377, now seen corresponding path program 42 times [2021-10-07 15:19:19,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:19:19,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115168181] [2021-10-07 15:19:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:19:19,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:19:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:20,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:19:20,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115168181] [2021-10-07 15:19:20,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115168181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:20,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296412164] [2021-10-07 15:19:20,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:19:20,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:20,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:19:20,248 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:19:20,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-10-07 15:19:23,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:19:23,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:19:23,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-07 15:19:23,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:19:23,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:19:24,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:19:24,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:19:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:25,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296412164] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:25,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:19:25,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 35 [2021-10-07 15:19:25,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280036865] [2021-10-07 15:19:25,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 15:19:25,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:19:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 15:19:25,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:19:25,168 INFO L87 Difference]: Start difference. First operand 1120 states and 3747 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:19:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:19:28,723 INFO L93 Difference]: Finished difference Result 1226 states and 3922 transitions. [2021-10-07 15:19:28,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 15:19:28,724 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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 21 [2021-10-07 15:19:28,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:19:28,726 INFO L225 Difference]: With dead ends: 1226 [2021-10-07 15:19:28,726 INFO L226 Difference]: Without dead ends: 1186 [2021-10-07 15:19:28,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 3803.0ms TimeCoverageRelationStatistics Valid=401, Invalid=4021, Unknown=0, NotChecked=0, Total=4422 [2021-10-07 15:19:28,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-10-07 15:19:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1116. [2021-10-07 15:19:28,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1114 states have (on average 3.3491921005385996) internal successors, (3731), 1115 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3731 transitions. [2021-10-07 15:19:28,743 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3731 transitions. Word has length 21 [2021-10-07 15:19:28,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:19:28,743 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 3731 transitions. [2021-10-07 15:19:28,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:19:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3731 transitions. [2021-10-07 15:19:28,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:19:28,744 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:19:28,744 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:19:28,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-10-07 15:19:28,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-10-07 15:19:28,945 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:19:28,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:19:28,946 INFO L82 PathProgramCache]: Analyzing trace with hash 754482067, now seen corresponding path program 43 times [2021-10-07 15:19:28,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:19:28,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483100821] [2021-10-07 15:19:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:19:28,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:19:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:29,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:19:29,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483100821] [2021-10-07 15:19:29,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483100821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:29,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363688782] [2021-10-07 15:19:29,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:19:29,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:29,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:19:29,679 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:19:29,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-10-07 15:19:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:33,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-07 15:19:33,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:19:33,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-07 15:19:33,444 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:19:33,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:19:33,544 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:19:33,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:19:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:34,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363688782] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:34,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:19:34,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 35 [2021-10-07 15:19:34,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335581159] [2021-10-07 15:19:34,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 15:19:34,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:19:34,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 15:19:34,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:19:34,770 INFO L87 Difference]: Start difference. First operand 1116 states and 3731 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:19:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:19:37,438 INFO L93 Difference]: Finished difference Result 1228 states and 3923 transitions. [2021-10-07 15:19:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-07 15:19:37,439 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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 21 [2021-10-07 15:19:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:19:37,441 INFO L225 Difference]: With dead ends: 1228 [2021-10-07 15:19:37,441 INFO L226 Difference]: Without dead ends: 1216 [2021-10-07 15:19:37,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 3149.9ms TimeCoverageRelationStatistics Valid=565, Invalid=3467, Unknown=0, NotChecked=0, Total=4032 [2021-10-07 15:19:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-10-07 15:19:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1116. [2021-10-07 15:19:37,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1114 states have (on average 3.3473967684021546) internal successors, (3729), 1115 states have internal predecessors, (3729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:37,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3729 transitions. [2021-10-07 15:19:37,458 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3729 transitions. Word has length 21 [2021-10-07 15:19:37,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:19:37,458 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 3729 transitions. [2021-10-07 15:19:37,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:19:37,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3729 transitions. [2021-10-07 15:19:37,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:19:37,459 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:19:37,459 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:19:37,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-10-07 15:19:37,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:37,660 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:19:37,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:19:37,661 INFO L82 PathProgramCache]: Analyzing trace with hash 753127056, now seen corresponding path program 54 times [2021-10-07 15:19:37,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:19:37,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780825361] [2021-10-07 15:19:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:19:37,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:19:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:39,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:19:39,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780825361] [2021-10-07 15:19:39,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780825361] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:39,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421587352] [2021-10-07 15:19:39,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:19:39,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:39,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:19:39,015 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:19:39,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-10-07 15:19:42,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-07 15:19:42,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:19:42,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-07 15:19:42,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:19:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:44,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421587352] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:44,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:19:44,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-07 15:19:44,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072677980] [2021-10-07 15:19:44,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-07 15:19:44,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:19:44,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-07 15:19:44,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:19:44,121 INFO L87 Difference]: Start difference. First operand 1116 states and 3729 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:19:45,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:19:45,530 INFO L93 Difference]: Finished difference Result 1138 states and 3764 transitions. [2021-10-07 15:19:45,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 15:19:45,531 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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 21 [2021-10-07 15:19:45,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:19:45,533 INFO L225 Difference]: With dead ends: 1138 [2021-10-07 15:19:45,533 INFO L226 Difference]: Without dead ends: 1116 [2021-10-07 15:19:45,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 2408.7ms TimeCoverageRelationStatistics Valid=235, Invalid=2215, Unknown=0, NotChecked=0, Total=2450 [2021-10-07 15:19:45,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-10-07 15:19:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1106. [2021-10-07 15:19:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1104 states have (on average 3.3605072463768115) internal successors, (3710), 1105 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 3710 transitions. [2021-10-07 15:19:45,549 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 3710 transitions. Word has length 21 [2021-10-07 15:19:45,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:19:45,549 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 3710 transitions. [2021-10-07 15:19:45,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:19:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 3710 transitions. [2021-10-07 15:19:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:19:45,550 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:19:45,550 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:19:45,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-10-07 15:19:45,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-10-07 15:19:45,751 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:19:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:19:45,752 INFO L82 PathProgramCache]: Analyzing trace with hash 2034887506, now seen corresponding path program 55 times [2021-10-07 15:19:45,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:19:45,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511561141] [2021-10-07 15:19:45,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:19:45,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:19:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:46,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:19:46,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511561141] [2021-10-07 15:19:46,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511561141] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:46,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400958584] [2021-10-07 15:19:46,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:19:46,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:46,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:19:46,694 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:19:46,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-10-07 15:19:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:50,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-07 15:19:50,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:19:50,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:19:50,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-10-07 15:19:50,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:19:50,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:19:50,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:19:50,558 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-07 15:19:50,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 33 [2021-10-07 15:19:50,668 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-07 15:19:50,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-10-07 15:19:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:52,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400958584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:52,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:19:52,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2021-10-07 15:19:52,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914384528] [2021-10-07 15:19:52,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-07 15:19:52,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:19:52,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-07 15:19:52,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:19:52,107 INFO L87 Difference]: Start difference. First operand 1106 states and 3710 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) [2021-10-07 15:19:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:19:53,853 INFO L93 Difference]: Finished difference Result 1148 states and 3777 transitions. [2021-10-07 15:19:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:19:53,854 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 21 [2021-10-07 15:19:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:19:53,856 INFO L225 Difference]: With dead ends: 1148 [2021-10-07 15:19:53,856 INFO L226 Difference]: Without dead ends: 1134 [2021-10-07 15:19:53,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 2548.7ms TimeCoverageRelationStatistics Valid=346, Invalid=2306, Unknown=0, NotChecked=0, Total=2652 [2021-10-07 15:19:53,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-10-07 15:19:53,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1104. [2021-10-07 15:19:53,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1102 states have (on average 3.3620689655172415) internal successors, (3705), 1103 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 3705 transitions. [2021-10-07 15:19:53,874 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 3705 transitions. Word has length 21 [2021-10-07 15:19:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:19:53,874 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 3705 transitions. [2021-10-07 15:19:53,875 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) [2021-10-07 15:19:53,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 3705 transitions. [2021-10-07 15:19:53,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:19:53,875 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:19:53,875 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:19:53,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-10-07 15:19:54,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:54,076 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:19:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:19:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1991527186, now seen corresponding path program 56 times [2021-10-07 15:19:54,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:19:54,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058431844] [2021-10-07 15:19:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:19:54,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:19:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:55,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:19:55,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058431844] [2021-10-07 15:19:55,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058431844] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:55,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709932315] [2021-10-07 15:19:55,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:19:55,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:55,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:19:55,300 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:19:55,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-10-07 15:19:58,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:19:58,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:19:58,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-07 15:19:58,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:20:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:20:00,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709932315] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:00,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:20:00,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-07 15:20:00,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385142537] [2021-10-07 15:20:00,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-07 15:20:00,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:20:00,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-07 15:20:00,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1152, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:20:00,238 INFO L87 Difference]: Start difference. First operand 1104 states and 3705 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:20:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:20:02,316 INFO L93 Difference]: Finished difference Result 1114 states and 3720 transitions. [2021-10-07 15:20:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:20:02,317 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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 21 [2021-10-07 15:20:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:20:02,319 INFO L225 Difference]: With dead ends: 1114 [2021-10-07 15:20:02,319 INFO L226 Difference]: Without dead ends: 1096 [2021-10-07 15:20:02,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 2878.4ms TimeCoverageRelationStatistics Valid=262, Invalid=2708, Unknown=0, NotChecked=0, Total=2970 [2021-10-07 15:20:02,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-10-07 15:20:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1094. [2021-10-07 15:20:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1092 states have (on average 3.3772893772893773) internal successors, (3688), 1093 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:20:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3688 transitions. [2021-10-07 15:20:02,336 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3688 transitions. Word has length 21 [2021-10-07 15:20:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:20:02,336 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 3688 transitions. [2021-10-07 15:20:02,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-10-07 15:20:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3688 transitions. [2021-10-07 15:20:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:20:02,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:20:02,337 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:20:02,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-10-07 15:20:02,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-10-07 15:20:02,537 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:20:02,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:20:02,538 INFO L82 PathProgramCache]: Analyzing trace with hash 155208338, now seen corresponding path program 57 times [2021-10-07 15:20:02,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:20:02,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551097880] [2021-10-07 15:20:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:20:02,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:20:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:20:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:20:03,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:20:03,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551097880] [2021-10-07 15:20:03,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551097880] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:03,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054223222] [2021-10-07 15:20:03,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:20:03,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:20:03,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:20:03,893 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:20:03,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-10-07 15:20:07,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:20:07,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:20:07,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-07 15:20:07,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:20:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-07 15:20:08,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054223222] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:08,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:20:08,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 29 [2021-10-07 15:20:08,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91759630] [2021-10-07 15:20:08,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:20:08,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:20:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:20:08,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:20:08,471 INFO L87 Difference]: Start difference. First operand 1094 states and 3688 transitions. Second operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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) [2021-10-07 15:20:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:20:10,651 INFO L93 Difference]: Finished difference Result 1134 states and 3768 transitions. [2021-10-07 15:20:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-07 15:20:10,652 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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 21 [2021-10-07 15:20:10,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:20:10,654 INFO L225 Difference]: With dead ends: 1134 [2021-10-07 15:20:10,654 INFO L226 Difference]: Without dead ends: 1118 [2021-10-07 15:20:10,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 2420.8ms TimeCoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2021-10-07 15:20:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-10-07 15:20:10,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1086. [2021-10-07 15:20:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1084 states have (on average 3.3837638376383765) internal successors, (3668), 1085 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:20:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 3668 transitions. [2021-10-07 15:20:10,749 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 3668 transitions. Word has length 21 [2021-10-07 15:20:10,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:20:10,750 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 3668 transitions. [2021-10-07 15:20:10,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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) [2021-10-07 15:20:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 3668 transitions. [2021-10-07 15:20:10,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:20:10,751 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:20:10,751 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:20:10,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-10-07 15:20:10,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:20:10,964 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:20:10,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:20:10,967 INFO L82 PathProgramCache]: Analyzing trace with hash 113203029, now seen corresponding path program 44 times [2021-10-07 15:20:10,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:20:10,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8822289] [2021-10-07 15:20:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:20:10,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:20:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:20:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:20:11,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:20:11,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8822289] [2021-10-07 15:20:11,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8822289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:11,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878862049] [2021-10-07 15:20:11,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:20:11,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:20:11,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:20:11,616 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:20:11,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-10-07 15:20:15,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:20:15,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:20:15,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-07 15:20:15,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:20:15,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:20:15,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 118 [2021-10-07 15:20:15,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:20:15,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:20:15,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-07 15:20:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:20:16,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878862049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:16,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:20:16,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 35 [2021-10-07 15:20:16,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451828804] [2021-10-07 15:20:16,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 15:20:16,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:20:16,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 15:20:16,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:20:16,759 INFO L87 Difference]: Start difference. First operand 1086 states and 3668 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:20:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:20:17,889 INFO L93 Difference]: Finished difference Result 1126 states and 3728 transitions. [2021-10-07 15:20:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 15:20:17,889 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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 21 [2021-10-07 15:20:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:20:17,891 INFO L225 Difference]: With dead ends: 1126 [2021-10-07 15:20:17,891 INFO L226 Difference]: Without dead ends: 1114 [2021-10-07 15:20:17,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1706.3ms TimeCoverageRelationStatistics Valid=216, Invalid=1854, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 15:20:17,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-10-07 15:20:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1086. [2021-10-07 15:20:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1084 states have (on average 3.3800738007380073) internal successors, (3664), 1085 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:20:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 3664 transitions. [2021-10-07 15:20:17,907 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 3664 transitions. Word has length 21 [2021-10-07 15:20:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:20:17,907 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 3664 transitions. [2021-10-07 15:20:17,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:20:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 3664 transitions. [2021-10-07 15:20:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:20:17,908 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:20:17,908 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:20:17,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-10-07 15:20:18,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-10-07 15:20:18,109 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:20:18,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:20:18,110 INFO L82 PathProgramCache]: Analyzing trace with hash 111848018, now seen corresponding path program 58 times [2021-10-07 15:20:18,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:20:18,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476955674] [2021-10-07 15:20:18,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:20:18,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:20:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:20:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:20:19,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:20:19,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476955674] [2021-10-07 15:20:19,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476955674] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:19,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383688404] [2021-10-07 15:20:19,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:20:19,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:20:19,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:20:19,592 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:20:19,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-10-07 15:20:23,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:20:23,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:20:23,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-07 15:20:23,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:20:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:20:24,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383688404] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:24,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:20:24,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 35 [2021-10-07 15:20:24,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419977917] [2021-10-07 15:20:24,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-07 15:20:24,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:20:24,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-07 15:20:24,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:20:24,757 INFO L87 Difference]: Start difference. First operand 1086 states and 3664 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:20:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:20:26,767 INFO L93 Difference]: Finished difference Result 1106 states and 3690 transitions. [2021-10-07 15:20:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 15:20:26,768 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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 21 [2021-10-07 15:20:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:20:26,770 INFO L225 Difference]: With dead ends: 1106 [2021-10-07 15:20:26,770 INFO L226 Difference]: Without dead ends: 1086 [2021-10-07 15:20:26,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2895.3ms TimeCoverageRelationStatistics Valid=281, Invalid=2689, Unknown=0, NotChecked=0, Total=2970 [2021-10-07 15:20:26,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-10-07 15:20:26,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1074. [2021-10-07 15:20:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1072 states have (on average 3.3936567164179103) internal successors, (3638), 1073 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:20:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3638 transitions. [2021-10-07 15:20:26,785 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3638 transitions. Word has length 21 [2021-10-07 15:20:26,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:20:26,786 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 3638 transitions. [2021-10-07 15:20:26,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-10-07 15:20:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3638 transitions. [2021-10-07 15:20:26,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:20:26,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:20:26,786 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:20:26,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-10-07 15:20:26,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-10-07 15:20:26,988 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:20:26,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:20:26,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1188961581, now seen corresponding path program 45 times [2021-10-07 15:20:26,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:20:26,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627676741] [2021-10-07 15:20:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:20:26,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:20:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:20:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:20:28,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:20:28,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627676741] [2021-10-07 15:20:28,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627676741] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:28,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605662526] [2021-10-07 15:20:28,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:20:28,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:20:28,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:20:28,715 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:20:28,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-10-07 15:20:32,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:20:32,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:20:32,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-07 15:20:32,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:20:33,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:20:33,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:20:33,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:20:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:20:34,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605662526] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:34,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:20:34,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2021-10-07 15:20:34,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793603318] [2021-10-07 15:20:34,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-07 15:20:34,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:20:34,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-07 15:20:34,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:20:34,334 INFO L87 Difference]: Start difference. First operand 1074 states and 3638 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) [2021-10-07 15:20:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:20:37,794 INFO L93 Difference]: Finished difference Result 1100 states and 3673 transitions. [2021-10-07 15:20:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:20:37,795 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 21 [2021-10-07 15:20:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:20:37,797 INFO L225 Difference]: With dead ends: 1100 [2021-10-07 15:20:37,797 INFO L226 Difference]: Without dead ends: 1068 [2021-10-07 15:20:37,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 4078.4ms TimeCoverageRelationStatistics Valid=356, Invalid=3550, Unknown=0, NotChecked=0, Total=3906 [2021-10-07 15:20:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-10-07 15:20:37,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1054. [2021-10-07 15:20:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1052 states have (on average 3.420152091254753) internal successors, (3598), 1053 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:20:37,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3598 transitions. [2021-10-07 15:20:37,820 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3598 transitions. Word has length 21 [2021-10-07 15:20:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:20:37,821 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 3598 transitions. [2021-10-07 15:20:37,821 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) [2021-10-07 15:20:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3598 transitions. [2021-10-07 15:20:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:20:37,822 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:20:37,822 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:20:37,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-10-07 15:20:38,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-10-07 15:20:38,036 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-07 15:20:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:20:38,036 INFO L82 PathProgramCache]: Analyzing trace with hash 473078608, now seen corresponding path program 59 times [2021-10-07 15:20:38,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:20:38,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886809653] [2021-10-07 15:20:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:20:38,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:20:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-10-07 15:20:38,978 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 [2021-10-07 15:20:38,983 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-10-07 15:20:38,984 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-20-2-4-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. [2021-10-07 15:20:38,985 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,985 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,985 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,986 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,986 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,986 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,986 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,986 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,986 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,986 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,986 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 15:20:38,987 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 15:20:38,987 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,987 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,987 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,987 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,987 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,987 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,987 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:38,994 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 15:20:38,994 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 15:20:38,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 03:20:38 BasicIcfg [2021-10-07 15:20:38,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 15:20:38,996 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.witnessprinter [2021-10-07 15:20:38,997 INFO L168 Benchmark]: Toolchain (without parser) took 728259.99 ms. Allocated memory was 175.1 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 149.5 MB in the beginning and 736.6 MB in the end (delta: -587.1 MB). Peak memory consumption was 947.9 MB. Max. memory is 8.0 GB. [2021-10-07 15:20:38,997 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 175.1 MB. Free memory was 147.7 MB in the beginning and 147.6 MB in the end (delta: 80.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 15:20:38,997 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.22 ms. Allocated memory is still 175.1 MB. Free memory was 149.1 MB in the beginning and 138.5 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-10-07 15:20:38,998 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.06 ms. Allocated memory is still 175.1 MB. Free memory was 138.4 MB in the beginning and 136.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 15:20:38,998 INFO L168 Benchmark]: Boogie Preprocessor took 76.50 ms. Allocated memory is still 175.1 MB. Free memory was 136.5 MB in the beginning and 135.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 15:20:38,998 INFO L168 Benchmark]: RCFGBuilder took 1040.97 ms. Allocated memory is still 175.1 MB. Free memory was 135.0 MB in the beginning and 142.4 MB in the end (delta: -7.5 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. [2021-10-07 15:20:38,999 INFO L168 Benchmark]: TraceAbstraction took 726680.81 ms. Allocated memory was 175.1 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 141.9 MB in the beginning and 736.6 MB in the end (delta: -594.7 MB). Peak memory consumption was 939.3 MB. Max. memory is 8.0 GB. [2021-10-07 15:20:39,000 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 175.1 MB. Free memory was 147.7 MB in the beginning and 147.6 MB in the end (delta: 80.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 363.22 ms. Allocated memory is still 175.1 MB. Free memory was 149.1 MB in the beginning and 138.5 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 84.06 ms. Allocated memory is still 175.1 MB. Free memory was 138.4 MB in the beginning and 136.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 76.50 ms. Allocated memory is still 175.1 MB. Free memory was 136.5 MB in the beginning and 135.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1040.97 ms. Allocated memory is still 175.1 MB. Free memory was 135.0 MB in the beginning and 142.4 MB in the end (delta: -7.5 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 726680.81 ms. Allocated memory was 175.1 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 141.9 MB in the beginning and 736.6 MB in the end (delta: -594.7 MB). Peak memory consumption was 939.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7031.0ms, 126 PlacesBefore, 32 PlacesAfterwards, 130 TransitionsBefore, 28 TransitionsAfterwards, 1044 CoEnabledTransitionPairs, 8 FixpointIterations, 78 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 9 ConcurrentYvCompositions, 8 ChoiceCompositions, 148 TotalNumberOfCompositions, 1470 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1396, positive: 1380, positive conditional: 0, positive unconditional: 1380, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 655, positive: 651, positive conditional: 0, positive unconditional: 651, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 655, positive: 651, positive conditional: 0, positive unconditional: 651, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 18, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 18, negative conditional: 0, negative unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1396, positive: 729, positive conditional: 0, positive unconditional: 729, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 655, unknown conditional: 0, unknown unconditional: 655] , Statistics on independence cache: Total cache size (in pairs): 46, Positive cache size: 45, Positive conditional cache size: 0, Positive unconditional cache size: 45, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - 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: 50]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-20-2-4-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-20-2-4-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-20-2-4-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-20-2-4-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-20-2-4-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-20-2-4-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-20-2-4-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-20-2-4-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-20-2-4-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-20-2-4-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-20-2-4-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 6,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PolyPacSimplificationTermWalker was simplifying a ∧-20-2-4-2-3-2-3-2-3-2-3-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 153 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 726440.2ms, OverallIterations: 115, TraceHistogramMax: 7, EmptinessCheckTime: 102.8ms, AutomataDifference: 271542.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7101.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1581 SDtfs, 8592 SDslu, 19880 SDs, 0 SdLazy, 85311 SolverSat, 3337 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 77878.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5421 GetRequests, 515 SyntacticMatches, 3 SemanticMatches, 4903 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55844 ImplicationChecksByTransitivity, 290107.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5716occurred in iteration=90, InterpolantAutomatonStates: 3217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2082.8ms AutomataMinimizationTime, 114 MinimizatonAttempts, 17267 StatesRemovedByMinimization, 106 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1274.1ms SsaConstructionTime, 15763.3ms SatisfiabilityAnalysisTime, 233195.1ms InterpolantComputationTime, 3896 NumberOfCodeBlocks, 3882 NumberOfCodeBlocksAsserted, 385 NumberOfCheckSat, 3672 ConstructedInterpolants, 70 QuantifiedInterpolants, 143425 SizeOfPredicates, 1643 NumberOfNonLiveVariables, 19860 ConjunctsInSsa, 3930 ConjunctsInUnsatCore, 224 InterpolantComputations, 9 PerfectInterpolantSequences, 431/5255 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