/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-c503be2 [2021-10-13 19:44:13,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 19:44:13,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 19:44:14,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-13 19:44:14,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 19:44:14,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 19:44:14,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 19:44:14,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 19:44:14,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 19:44:14,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 19:44:14,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 19:44:14,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 19:44:14,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 19:44:14,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 19:44:14,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 19:44:14,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 19:44:14,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 19:44:14,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 19:44:14,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 19:44:14,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 19:44:14,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-10-13 19:44:14,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 19:44:14,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 19:44:14,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 19:44:14,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 19:44:14,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 19:44:14,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 19:44:14,181 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 19:44:14,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 19:44:14,182 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 19:44:14,182 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 19:44:14,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 19:44:14,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 19:44:14,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 19:44:14,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 19:44:14,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 19:44:14,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 19:44:14,183 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-13 19:44:14,184 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 19:44:14,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 19:44:14,184 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 19:44:14,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 19:44:14,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 19:44:14,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 19:44:14,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 19:44:14,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 19:44:14,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 19:44:14,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 19:44:14,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 19:44:14,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 19:44:14,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 19:44:14,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 19:44:14,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 19:44:14,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 19:44:14,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 19:44:14,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 19:44:14,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 19:44:14,598 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 19:44:14,599 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 19:44:14,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2021-10-13 19:44:14,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b64e8166/0933743211d340f58f7f621495a410ad/FLAG8b6cbae34 [2021-10-13 19:44:15,386 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 19:44:15,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2021-10-13 19:44:15,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b64e8166/0933743211d340f58f7f621495a410ad/FLAG8b6cbae34 [2021-10-13 19:44:15,713 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b64e8166/0933743211d340f58f7f621495a410ad [2021-10-13 19:44:15,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 19:44:15,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 19:44:15,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 19:44:15,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 19:44:15,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 19:44:15,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:44:15" (1/1) ... [2021-10-13 19:44:15,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@275094d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:15, skipping insertion in model container [2021-10-13 19:44:15,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:44:15" (1/1) ... [2021-10-13 19:44:15,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 19:44:15,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 19:44:15,964 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[2650,2663] [2021-10-13 19:44:15,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 19:44:15,987 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 19:44:16,014 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[2650,2663] [2021-10-13 19:44:16,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 19:44:16,037 INFO L208 MainTranslator]: Completed translation [2021-10-13 19:44:16,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:16 WrapperNode [2021-10-13 19:44:16,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 19:44:16,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 19:44:16,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 19:44:16,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 19:44:16,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:16" (1/1) ... [2021-10-13 19:44:16,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:16" (1/1) ... [2021-10-13 19:44:16,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 19:44:16,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 19:44:16,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 19:44:16,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 19:44:16,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:16" (1/1) ... [2021-10-13 19:44:16,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:16" (1/1) ... [2021-10-13 19:44:16,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:16" (1/1) ... [2021-10-13 19:44:16,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:16" (1/1) ... [2021-10-13 19:44:16,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:16" (1/1) ... [2021-10-13 19:44:16,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:16" (1/1) ... [2021-10-13 19:44:16,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:16" (1/1) ... [2021-10-13 19:44:16,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 19:44:16,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 19:44:16,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 19:44:16,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 19:44:16,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:16" (1/1) ... [2021-10-13 19:44:16,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 19:44:16,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:16,191 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) [2021-10-13 19:44:16,209 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 [2021-10-13 19:44:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 19:44:16,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 19:44:16,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 19:44:16,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 19:44:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 19:44:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 19:44:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 19:44:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 19:44:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 19:44:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 19:44:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 19:44:16,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 19:44:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 19:44:16,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 19:44:16,270 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 19:44:17,117 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 19:44:17,117 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-10-13 19:44:17,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:44:17 BoogieIcfgContainer [2021-10-13 19:44:17,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 19:44:17,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 19:44:17,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 19:44:17,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 19:44:17,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:44:15" (1/3) ... [2021-10-13 19:44:17,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a293ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:44:17, skipping insertion in model container [2021-10-13 19:44:17,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:16" (2/3) ... [2021-10-13 19:44:17,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a293ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:44:17, skipping insertion in model container [2021-10-13 19:44:17,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:44:17" (3/3) ... [2021-10-13 19:44:17,131 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2021-10-13 19:44:17,139 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-13 19:44:17,139 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 19:44:17,140 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-13 19:44:17,140 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 19:44:17,180 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,180 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,181 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,181 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,181 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,181 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,181 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,182 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,182 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,182 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,182 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,182 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,183 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,183 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,183 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,183 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,184 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,184 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,184 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,184 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,184 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,185 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,185 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,185 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,185 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,186 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,186 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,186 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,186 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,186 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,187 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,187 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,187 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,187 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,187 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,188 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,188 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,188 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,188 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,188 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,189 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,189 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,189 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,189 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,189 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,190 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,190 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,190 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,191 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,191 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,192 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,192 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,192 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,192 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,192 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,193 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,193 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,193 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,193 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,193 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,194 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,194 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,194 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,194 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,195 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,195 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,195 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,195 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,195 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,196 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,196 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,196 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,196 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,197 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,197 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,197 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,197 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,198 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,198 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,198 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,198 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,198 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,199 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,199 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,199 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,199 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,200 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,200 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,200 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,200 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,201 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,201 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,201 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,201 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,201 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,202 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,202 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,202 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,202 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,203 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,203 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,203 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,203 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,203 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,204 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,204 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,204 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,204 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,205 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,205 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,205 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,205 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,205 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,206 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,206 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,206 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,206 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,207 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,207 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,207 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,207 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,208 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,208 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,208 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,208 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,209 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,209 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,209 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,209 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,209 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,216 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,216 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,217 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,217 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,217 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,217 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,217 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,219 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,220 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,220 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,220 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,220 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,221 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,221 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,221 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,221 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,222 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:44:17,228 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-13 19:44:17,292 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 19:44:17,301 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 [2021-10-13 19:44:17,301 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-13 19:44:17,321 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 19:44:17,334 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 130 transitions, 276 flow [2021-10-13 19:44:17,337 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 130 transitions, 276 flow [2021-10-13 19:44:17,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 126 places, 130 transitions, 276 flow [2021-10-13 19:44:17,410 INFO L129 PetriNetUnfolder]: 11/128 cut-off events. [2021-10-13 19:44:17,410 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-13 19:44:17,417 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. [2021-10-13 19:44:17,420 INFO L116 LiptonReduction]: Number of co-enabled transitions 1044 [2021-10-13 19:44:24,892 INFO L131 LiptonReduction]: Checked pairs total: 1470 [2021-10-13 19:44:24,893 INFO L133 LiptonReduction]: Total number of compositions: 148 [2021-10-13 19:44:24,903 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-10-13 19:44:24,923 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) [2021-10-13 19:44:24,926 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) [2021-10-13 19:44:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 19:44:24,932 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:24,933 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 19:44:24,933 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:24,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:24,940 INFO L82 PathProgramCache]: Analyzing trace with hash 19866, now seen corresponding path program 1 times [2021-10-13 19:44:24,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:24,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157455138] [2021-10-13 19:44:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:24,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:25,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:25,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157455138] [2021-10-13 19:44:25,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157455138] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:44:25,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:44:25,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 19:44:25,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37139727] [2021-10-13 19:44:25,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:44:25,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:25,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:44:25,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:44:25,293 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) [2021-10-13 19:44:25,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:25,340 INFO L93 Difference]: Finished difference Result 139 states and 321 transitions. [2021-10-13 19:44:25,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:44:25,342 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 [2021-10-13 19:44:25,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:25,356 INFO L225 Difference]: With dead ends: 139 [2021-10-13 19:44:25,356 INFO L226 Difference]: Without dead ends: 139 [2021-10-13 19:44:25,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:44:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-13 19:44:25,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 72. [2021-10-13 19:44:25,420 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) [2021-10-13 19:44:25,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 164 transitions. [2021-10-13 19:44:25,431 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 164 transitions. Word has length 2 [2021-10-13 19:44:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:25,432 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 164 transitions. [2021-10-13 19:44:25,433 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) [2021-10-13 19:44:25,433 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 164 transitions. [2021-10-13 19:44:25,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 19:44:25,434 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:25,434 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 19:44:25,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 19:44:25,435 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:25,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:25,436 INFO L82 PathProgramCache]: Analyzing trace with hash 616988, now seen corresponding path program 1 times [2021-10-13 19:44:25,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:25,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822180543] [2021-10-13 19:44:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:25,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:25,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:25,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822180543] [2021-10-13 19:44:25,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822180543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:25,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270481983] [2021-10-13 19:44:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:25,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:25,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:25,549 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) [2021-10-13 19:44:25,557 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 [2021-10-13 19:44:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:25,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 19:44:25,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:25,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270481983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:25,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:44:25,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2021-10-13 19:44:25,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914286499] [2021-10-13 19:44:25,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 19:44:25,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:25,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 19:44:25,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:44:25,675 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) [2021-10-13 19:44:25,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:25,713 INFO L93 Difference]: Finished difference Result 207 states and 481 transitions. [2021-10-13 19:44:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 19:44:25,713 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 [2021-10-13 19:44:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:25,718 INFO L225 Difference]: With dead ends: 207 [2021-10-13 19:44:25,718 INFO L226 Difference]: Without dead ends: 207 [2021-10-13 19:44:25,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:44:25,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-13 19:44:25,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 73. [2021-10-13 19:44:25,733 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) [2021-10-13 19:44:25,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 167 transitions. [2021-10-13 19:44:25,735 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 167 transitions. Word has length 3 [2021-10-13 19:44:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:25,735 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 167 transitions. [2021-10-13 19:44:25,735 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) [2021-10-13 19:44:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 167 transitions. [2021-10-13 19:44:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 19:44:25,736 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:25,736 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 19:44:25,809 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 [2021-10-13 19:44:25,950 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 [2021-10-13 19:44:25,951 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:25,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:25,952 INFO L82 PathProgramCache]: Analyzing trace with hash 617008, now seen corresponding path program 1 times [2021-10-13 19:44:25,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:25,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764977926] [2021-10-13 19:44:25,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:25,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:26,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:26,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764977926] [2021-10-13 19:44:26,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764977926] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:44:26,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:44:26,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 19:44:26,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965253693] [2021-10-13 19:44:26,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:44:26,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:26,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:44:26,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:44:26,027 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) [2021-10-13 19:44:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:26,039 INFO L93 Difference]: Finished difference Result 72 states and 165 transitions. [2021-10-13 19:44:26,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:44:26,040 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 [2021-10-13 19:44:26,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:26,042 INFO L225 Difference]: With dead ends: 72 [2021-10-13 19:44:26,042 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 19:44:26,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:44:26,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 19:44:26,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-13 19:44:26,051 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) [2021-10-13 19:44:26,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 165 transitions. [2021-10-13 19:44:26,052 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 165 transitions. Word has length 3 [2021-10-13 19:44:26,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:26,053 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 165 transitions. [2021-10-13 19:44:26,053 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) [2021-10-13 19:44:26,053 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 165 transitions. [2021-10-13 19:44:26,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 19:44:26,054 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:26,054 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-13 19:44:26,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 19:44:26,055 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:26,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:26,056 INFO L82 PathProgramCache]: Analyzing trace with hash 19127770, now seen corresponding path program 2 times [2021-10-13 19:44:26,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:26,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523686868] [2021-10-13 19:44:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:26,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:26,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:26,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523686868] [2021-10-13 19:44:26,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523686868] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:26,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359399598] [2021-10-13 19:44:26,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:44:26,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:26,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:26,120 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) [2021-10-13 19:44:26,138 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 [2021-10-13 19:44:26,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 19:44:26,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:44:26,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 19:44:26,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:44:26,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359399598] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:44:26,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 19:44:26,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2021-10-13 19:44:26,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034109627] [2021-10-13 19:44:26,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:44:26,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:44:26,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:44:26,209 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) [2021-10-13 19:44:26,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:26,221 INFO L93 Difference]: Finished difference Result 71 states and 164 transitions. [2021-10-13 19:44:26,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:44:26,221 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 [2021-10-13 19:44:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:26,223 INFO L225 Difference]: With dead ends: 71 [2021-10-13 19:44:26,224 INFO L226 Difference]: Without dead ends: 71 [2021-10-13 19:44:26,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:44:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-13 19:44:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-10-13 19:44:26,252 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) [2021-10-13 19:44:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 160 transitions. [2021-10-13 19:44:26,254 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 160 transitions. Word has length 4 [2021-10-13 19:44:26,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:26,254 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 160 transitions. [2021-10-13 19:44:26,255 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) [2021-10-13 19:44:26,257 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 160 transitions. [2021-10-13 19:44:26,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 19:44:26,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:26,258 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 19:44:26,301 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 [2021-10-13 19:44:26,475 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 [2021-10-13 19:44:26,476 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:26,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:26,477 INFO L82 PathProgramCache]: Analyzing trace with hash 19125578, now seen corresponding path program 1 times [2021-10-13 19:44:26,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:26,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564294600] [2021-10-13 19:44:26,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:26,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:26,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:26,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564294600] [2021-10-13 19:44:26,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564294600] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:44:26,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:44:26,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 19:44:26,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598247431] [2021-10-13 19:44:26,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:44:26,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:26,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:44:26,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:44:26,536 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) [2021-10-13 19:44:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:26,561 INFO L93 Difference]: Finished difference Result 77 states and 168 transitions. [2021-10-13 19:44:26,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:44:26,562 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 [2021-10-13 19:44:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:26,563 INFO L225 Difference]: With dead ends: 77 [2021-10-13 19:44:26,564 INFO L226 Difference]: Without dead ends: 75 [2021-10-13 19:44:26,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:44:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-13 19:44:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2021-10-13 19:44:26,569 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) [2021-10-13 19:44:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 144 transitions. [2021-10-13 19:44:26,570 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 144 transitions. Word has length 4 [2021-10-13 19:44:26,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:26,570 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 144 transitions. [2021-10-13 19:44:26,570 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) [2021-10-13 19:44:26,571 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 144 transitions. [2021-10-13 19:44:26,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 19:44:26,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:26,571 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:26,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 19:44:26,572 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:26,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1459611487, now seen corresponding path program 1 times [2021-10-13 19:44:26,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:26,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889493074] [2021-10-13 19:44:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:26,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:26,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:26,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889493074] [2021-10-13 19:44:26,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889493074] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:44:26,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:44:26,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 19:44:26,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552283881] [2021-10-13 19:44:26,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:44:26,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:26,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:44:26,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:44:26,641 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) [2021-10-13 19:44:26,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:26,691 INFO L93 Difference]: Finished difference Result 81 states and 171 transitions. [2021-10-13 19:44:26,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 19:44:26,692 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 [2021-10-13 19:44:26,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:26,694 INFO L225 Difference]: With dead ends: 81 [2021-10-13 19:44:26,694 INFO L226 Difference]: Without dead ends: 64 [2021-10-13 19:44:26,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:44:26,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-13 19:44:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-13 19:44:26,710 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) [2021-10-13 19:44:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 145 transitions. [2021-10-13 19:44:26,717 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 145 transitions. Word has length 7 [2021-10-13 19:44:26,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:26,717 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 145 transitions. [2021-10-13 19:44:26,717 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) [2021-10-13 19:44:26,718 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 145 transitions. [2021-10-13 19:44:26,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 19:44:26,718 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:26,718 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:26,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 19:44:26,719 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:26,720 INFO L82 PathProgramCache]: Analyzing trace with hash -333546145, now seen corresponding path program 1 times [2021-10-13 19:44:26,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:26,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556897997] [2021-10-13 19:44:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:26,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:26,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:26,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556897997] [2021-10-13 19:44:26,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556897997] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:26,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131021514] [2021-10-13 19:44:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:26,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:26,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:26,804 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) [2021-10-13 19:44:26,825 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 [2021-10-13 19:44:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:26,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 19:44:26,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:44:26,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131021514] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:44:26,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 19:44:26,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2021-10-13 19:44:26,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300989354] [2021-10-13 19:44:26,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:44:26,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:44:26,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:44:26,914 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) [2021-10-13 19:44:26,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:26,930 INFO L93 Difference]: Finished difference Result 32 states and 67 transitions. [2021-10-13 19:44:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:44:26,931 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 [2021-10-13 19:44:26,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:26,931 INFO L225 Difference]: With dead ends: 32 [2021-10-13 19:44:26,932 INFO L226 Difference]: Without dead ends: 22 [2021-10-13 19:44:26,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:44:26,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-13 19:44:26,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-13 19:44:26,934 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) [2021-10-13 19:44:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 43 transitions. [2021-10-13 19:44:26,935 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 43 transitions. Word has length 8 [2021-10-13 19:44:26,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:26,935 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 43 transitions. [2021-10-13 19:44:26,935 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) [2021-10-13 19:44:26,936 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 43 transitions. [2021-10-13 19:44:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 19:44:26,936 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:26,936 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:26,978 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 [2021-10-13 19:44:27,150 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 [2021-10-13 19:44:27,151 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:27,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1749995310, now seen corresponding path program 1 times [2021-10-13 19:44:27,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:27,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933329075] [2021-10-13 19:44:27,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:27,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:27,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:27,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933329075] [2021-10-13 19:44:27,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933329075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:27,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307546774] [2021-10-13 19:44:27,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:27,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:27,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:27,573 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) [2021-10-13 19:44:27,599 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 [2021-10-13 19:44:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:27,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 19:44:27,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:27,722 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 [2021-10-13 19:44:27,839 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 [2021-10-13 19:44:27,955 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:44:27,956 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 [2021-10-13 19:44:28,062 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:44:28,062 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 [2021-10-13 19:44:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:28,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307546774] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:28,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:44:28,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:44:28,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274272648] [2021-10-13 19:44:28,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:44:28,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:44:28,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:44:28,226 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) [2021-10-13 19:44:28,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:28,584 INFO L93 Difference]: Finished difference Result 38 states and 74 transitions. [2021-10-13 19:44:28,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 19:44:28,584 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 [2021-10-13 19:44:28,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:28,585 INFO L225 Difference]: With dead ends: 38 [2021-10-13 19:44:28,585 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 19:44:28,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:44:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 19:44:28,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2021-10-13 19:44:28,588 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) [2021-10-13 19:44:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 68 transitions. [2021-10-13 19:44:28,589 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 68 transitions. Word has length 9 [2021-10-13 19:44:28,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:28,590 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 68 transitions. [2021-10-13 19:44:28,590 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) [2021-10-13 19:44:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 68 transitions. [2021-10-13 19:44:28,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 19:44:28,591 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:28,591 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:28,620 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 [2021-10-13 19:44:28,800 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 [2021-10-13 19:44:28,801 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:28,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:28,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1749995309, now seen corresponding path program 1 times [2021-10-13 19:44:28,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:28,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604381485] [2021-10-13 19:44:28,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:28,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:29,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:29,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604381485] [2021-10-13 19:44:29,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604381485] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:29,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850385687] [2021-10-13 19:44:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:29,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:29,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:29,169 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) [2021-10-13 19:44:29,184 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 [2021-10-13 19:44:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:29,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 19:44:29,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:29,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:44:29,300 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 [2021-10-13 19:44:29,401 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 [2021-10-13 19:44:29,500 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:44:29,501 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 [2021-10-13 19:44:29,603 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:44:29,604 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 [2021-10-13 19:44:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:29,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850385687] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:29,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:44:29,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:44:29,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069399746] [2021-10-13 19:44:29,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:44:29,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:29,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:44:29,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:44:29,741 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) [2021-10-13 19:44:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:30,264 INFO L93 Difference]: Finished difference Result 38 states and 74 transitions. [2021-10-13 19:44:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 19:44:30,265 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 [2021-10-13 19:44:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:30,266 INFO L225 Difference]: With dead ends: 38 [2021-10-13 19:44:30,266 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 19:44:30,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 534.6ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-10-13 19:44:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 19:44:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2021-10-13 19:44:30,268 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) [2021-10-13 19:44:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 64 transitions. [2021-10-13 19:44:30,269 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 64 transitions. Word has length 9 [2021-10-13 19:44:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:30,269 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 64 transitions. [2021-10-13 19:44:30,270 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) [2021-10-13 19:44:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 64 transitions. [2021-10-13 19:44:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 19:44:30,270 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:30,271 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:30,298 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 [2021-10-13 19:44:30,482 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 [2021-10-13 19:44:30,483 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:30,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:30,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1932960240, now seen corresponding path program 2 times [2021-10-13 19:44:30,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:30,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587265591] [2021-10-13 19:44:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:30,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:31,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:31,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587265591] [2021-10-13 19:44:31,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587265591] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:31,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646656304] [2021-10-13 19:44:31,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:44:31,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:31,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:31,074 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) [2021-10-13 19:44:31,096 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 [2021-10-13 19:44:31,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 19:44:31,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:44:31,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 19:44:31,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:44:31,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646656304] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:44:31,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 19:44:31,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2021-10-13 19:44:31,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101018857] [2021-10-13 19:44:31,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 19:44:31,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:31,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 19:44:31,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:44:31,319 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) [2021-10-13 19:44:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:31,354 INFO L93 Difference]: Finished difference Result 42 states and 84 transitions. [2021-10-13 19:44:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 19:44:31,355 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 [2021-10-13 19:44:31,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:31,355 INFO L225 Difference]: With dead ends: 42 [2021-10-13 19:44:31,356 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 19:44:31,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:44:31,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 19:44:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-10-13 19:44:31,363 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) [2021-10-13 19:44:31,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2021-10-13 19:44:31,364 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 10 [2021-10-13 19:44:31,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:31,364 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2021-10-13 19:44:31,364 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) [2021-10-13 19:44:31,364 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2021-10-13 19:44:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 19:44:31,366 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:31,367 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:31,413 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 [2021-10-13 19:44:31,581 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 [2021-10-13 19:44:31,582 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:31,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:31,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1932960239, now seen corresponding path program 2 times [2021-10-13 19:44:31,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:31,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709401151] [2021-10-13 19:44:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:31,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:32,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:32,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709401151] [2021-10-13 19:44:32,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709401151] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:32,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855719527] [2021-10-13 19:44:32,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:44:32,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:32,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:32,164 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) [2021-10-13 19:44:32,191 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 [2021-10-13 19:44:32,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 19:44:32,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:44:32,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 19:44:32,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:44:32,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855719527] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:44:32,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 19:44:32,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2021-10-13 19:44:32,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968505812] [2021-10-13 19:44:32,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:44:32,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:32,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:44:32,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:44:32,434 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) [2021-10-13 19:44:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:32,465 INFO L93 Difference]: Finished difference Result 38 states and 74 transitions. [2021-10-13 19:44:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 19:44:32,466 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 [2021-10-13 19:44:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:32,466 INFO L225 Difference]: With dead ends: 38 [2021-10-13 19:44:32,466 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 19:44:32,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:44:32,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 19:44:32,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2021-10-13 19:44:32,468 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) [2021-10-13 19:44:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 53 transitions. [2021-10-13 19:44:32,469 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 53 transitions. Word has length 10 [2021-10-13 19:44:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:32,469 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 53 transitions. [2021-10-13 19:44:32,470 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) [2021-10-13 19:44:32,470 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 53 transitions. [2021-10-13 19:44:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 19:44:32,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:32,470 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:32,509 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 [2021-10-13 19:44:32,683 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 [2021-10-13 19:44:32,684 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:32,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:32,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1584720831, now seen corresponding path program 1 times [2021-10-13 19:44:32,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:32,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210555971] [2021-10-13 19:44:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:32,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:32,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:32,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210555971] [2021-10-13 19:44:32,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210555971] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:32,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746848597] [2021-10-13 19:44:32,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:32,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:32,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:32,752 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) [2021-10-13 19:44:32,775 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 [2021-10-13 19:44:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:32,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 19:44:32,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:32,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746848597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:32,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:44:32,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:44:32,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104716452] [2021-10-13 19:44:32,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:44:32,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:32,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:44:32,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:44:32,992 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) [2021-10-13 19:44:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:33,087 INFO L93 Difference]: Finished difference Result 46 states and 86 transitions. [2021-10-13 19:44:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 19:44:33,088 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 [2021-10-13 19:44:33,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:33,088 INFO L225 Difference]: With dead ends: 46 [2021-10-13 19:44:33,089 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 19:44:33,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:44:33,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 19:44:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 19:44:33,091 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) [2021-10-13 19:44:33,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 54 transitions. [2021-10-13 19:44:33,091 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 54 transitions. Word has length 10 [2021-10-13 19:44:33,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:33,092 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 54 transitions. [2021-10-13 19:44:33,092 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) [2021-10-13 19:44:33,092 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 54 transitions. [2021-10-13 19:44:33,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 19:44:33,093 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:33,093 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:33,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 19:44:33,302 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 [2021-10-13 19:44:33,303 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:33,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:33,305 INFO L82 PathProgramCache]: Analyzing trace with hash 207775297, now seen corresponding path program 2 times [2021-10-13 19:44:33,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:33,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954829563] [2021-10-13 19:44:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:33,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:44:33,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:33,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954829563] [2021-10-13 19:44:33,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954829563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:33,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108248659] [2021-10-13 19:44:33,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:44:33,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:33,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:33,374 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) [2021-10-13 19:44:33,375 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 [2021-10-13 19:44:33,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:44:33,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:44:33,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:44:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:33,566 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 [2021-10-13 19:44:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:44:33,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108248659] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:44:33,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 19:44:33,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-10-13 19:44:33,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059848943] [2021-10-13 19:44:33,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:44:33,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:33,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:44:33,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:44:33,593 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) [2021-10-13 19:44:33,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:33,638 INFO L93 Difference]: Finished difference Result 47 states and 100 transitions. [2021-10-13 19:44:33,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 19:44:33,638 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 [2021-10-13 19:44:33,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:33,640 INFO L225 Difference]: With dead ends: 47 [2021-10-13 19:44:33,640 INFO L226 Difference]: Without dead ends: 43 [2021-10-13 19:44:33,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-13 19:44:33,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-13 19:44:33,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-10-13 19:44:33,643 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) [2021-10-13 19:44:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 78 transitions. [2021-10-13 19:44:33,643 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 78 transitions. Word has length 11 [2021-10-13 19:44:33,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:33,643 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 78 transitions. [2021-10-13 19:44:33,644 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) [2021-10-13 19:44:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 78 transitions. [2021-10-13 19:44:33,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 19:44:33,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:33,645 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:33,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 19:44:33,860 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 [2021-10-13 19:44:33,861 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:33,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2146112671, now seen corresponding path program 3 times [2021-10-13 19:44:33,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:33,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501641420] [2021-10-13 19:44:33,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:33,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:34,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:34,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501641420] [2021-10-13 19:44:34,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501641420] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:34,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515430799] [2021-10-13 19:44:34,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:44:34,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:34,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:34,245 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) [2021-10-13 19:44:34,260 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 [2021-10-13 19:44:34,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:44:34,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:44:34,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 19:44:34,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:34,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:44:34,414 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 [2021-10-13 19:44:34,540 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 [2021-10-13 19:44:34,654 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-13 19:44:34,655 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 [2021-10-13 19:44:34,755 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-13 19:44:34,756 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 [2021-10-13 19:44:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:35,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515430799] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:35,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:44:35,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-13 19:44:35,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003147502] [2021-10-13 19:44:35,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 19:44:35,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:35,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 19:44:35,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-10-13 19:44:35,475 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) [2021-10-13 19:44:36,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:36,416 INFO L93 Difference]: Finished difference Result 77 states and 160 transitions. [2021-10-13 19:44:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 19:44:36,416 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 [2021-10-13 19:44:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:36,421 INFO L225 Difference]: With dead ends: 77 [2021-10-13 19:44:36,421 INFO L226 Difference]: Without dead ends: 75 [2021-10-13 19:44:36,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1057.3ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:44:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-13 19:44:36,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2021-10-13 19:44:36,431 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) [2021-10-13 19:44:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 149 transitions. [2021-10-13 19:44:36,431 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 149 transitions. Word has length 12 [2021-10-13 19:44:36,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:36,432 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 149 transitions. [2021-10-13 19:44:36,432 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) [2021-10-13 19:44:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 149 transitions. [2021-10-13 19:44:36,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 19:44:36,434 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:36,434 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:36,473 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 [2021-10-13 19:44:36,647 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 [2021-10-13 19:44:36,648 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:36,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:36,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2146112672, now seen corresponding path program 1 times [2021-10-13 19:44:36,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:36,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146067917] [2021-10-13 19:44:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:36,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:37,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:37,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146067917] [2021-10-13 19:44:37,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146067917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:37,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897652392] [2021-10-13 19:44:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:37,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:37,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:37,015 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) [2021-10-13 19:44:37,040 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 [2021-10-13 19:44:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:37,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 19:44:37,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:37,217 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 [2021-10-13 19:44:37,359 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 [2021-10-13 19:44:37,432 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:44:37,432 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 [2021-10-13 19:44:37,514 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:44:37,515 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 [2021-10-13 19:44:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:37,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897652392] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:37,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:44:37,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2021-10-13 19:44:37,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059840796] [2021-10-13 19:44:37,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 19:44:37,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:37,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 19:44:37,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:44:37,910 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) [2021-10-13 19:44:38,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:38,569 INFO L93 Difference]: Finished difference Result 75 states and 161 transitions. [2021-10-13 19:44:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:44:38,569 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 [2021-10-13 19:44:38,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:38,570 INFO L225 Difference]: With dead ends: 75 [2021-10-13 19:44:38,570 INFO L226 Difference]: Without dead ends: 71 [2021-10-13 19:44:38,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 798.6ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-10-13 19:44:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-13 19:44:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2021-10-13 19:44:38,574 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) [2021-10-13 19:44:38,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 147 transitions. [2021-10-13 19:44:38,575 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 147 transitions. Word has length 12 [2021-10-13 19:44:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:38,575 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 147 transitions. [2021-10-13 19:44:38,575 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) [2021-10-13 19:44:38,576 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 147 transitions. [2021-10-13 19:44:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 19:44:38,576 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:38,576 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:38,609 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 [2021-10-13 19:44:38,789 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 [2021-10-13 19:44:38,790 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:38,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:38,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2146068961, now seen corresponding path program 4 times [2021-10-13 19:44:38,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:38,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329917493] [2021-10-13 19:44:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:38,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:39,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:39,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329917493] [2021-10-13 19:44:39,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329917493] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:39,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052902722] [2021-10-13 19:44:39,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:44:39,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:39,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:39,268 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) [2021-10-13 19:44:39,269 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 [2021-10-13 19:44:39,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:44:39,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:44:39,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 19:44:39,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:39,495 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 [2021-10-13 19:44:39,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-13 19:44:39,703 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 [2021-10-13 19:44:39,761 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 [2021-10-13 19:44:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:40,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052902722] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:40,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:44:40,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-13 19:44:40,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775927184] [2021-10-13 19:44:40,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 19:44:40,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:40,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 19:44:40,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-10-13 19:44:40,064 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) [2021-10-13 19:44:40,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:40,449 INFO L93 Difference]: Finished difference Result 79 states and 165 transitions. [2021-10-13 19:44:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:44:40,450 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 [2021-10-13 19:44:40,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:40,451 INFO L225 Difference]: With dead ends: 79 [2021-10-13 19:44:40,451 INFO L226 Difference]: Without dead ends: 77 [2021-10-13 19:44:40,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:44:40,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-13 19:44:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-10-13 19:44:40,455 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) [2021-10-13 19:44:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 155 transitions. [2021-10-13 19:44:40,456 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 155 transitions. Word has length 12 [2021-10-13 19:44:40,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:40,456 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 155 transitions. [2021-10-13 19:44:40,456 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) [2021-10-13 19:44:40,456 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 155 transitions. [2021-10-13 19:44:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 19:44:40,457 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:40,457 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:40,494 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 [2021-10-13 19:44:40,667 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 [2021-10-13 19:44:40,668 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:40,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:40,669 INFO L82 PathProgramCache]: Analyzing trace with hash 2146068962, now seen corresponding path program 2 times [2021-10-13 19:44:40,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:40,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564076293] [2021-10-13 19:44:40,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:40,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:41,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:41,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564076293] [2021-10-13 19:44:41,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564076293] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:41,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774099740] [2021-10-13 19:44:41,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:44:41,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:41,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:41,081 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) [2021-10-13 19:44:41,102 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 [2021-10-13 19:44:41,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:44:41,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:44:41,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-13 19:44:41,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:41,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:44:41,349 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 [2021-10-13 19:44:41,473 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 [2021-10-13 19:44:41,572 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-13 19:44:41,573 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 36 treesize of output 35 [2021-10-13 19:44:41,673 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-13 19:44:41,673 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 [2021-10-13 19:44:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:42,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774099740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:42,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:44:42,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2021-10-13 19:44:42,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951996596] [2021-10-13 19:44:42,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 19:44:42,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:42,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 19:44:42,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:44:42,110 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) [2021-10-13 19:44:42,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:42,699 INFO L93 Difference]: Finished difference Result 73 states and 154 transitions. [2021-10-13 19:44:42,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 19:44:42,702 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 [2021-10-13 19:44:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:42,703 INFO L225 Difference]: With dead ends: 73 [2021-10-13 19:44:42,703 INFO L226 Difference]: Without dead ends: 67 [2021-10-13 19:44:42,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 787.4ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:44:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-13 19:44:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-10-13 19:44:42,707 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) [2021-10-13 19:44:42,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 145 transitions. [2021-10-13 19:44:42,708 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 145 transitions. Word has length 12 [2021-10-13 19:44:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:42,708 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 145 transitions. [2021-10-13 19:44:42,708 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) [2021-10-13 19:44:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 145 transitions. [2021-10-13 19:44:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 19:44:42,709 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:42,709 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:42,750 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 [2021-10-13 19:44:42,923 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 [2021-10-13 19:44:42,923 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:42,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1751381665, now seen corresponding path program 5 times [2021-10-13 19:44:42,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:42,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902846419] [2021-10-13 19:44:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:42,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:43,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:43,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902846419] [2021-10-13 19:44:43,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902846419] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:43,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985777830] [2021-10-13 19:44:43,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:44:43,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:43,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:43,424 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) [2021-10-13 19:44:43,425 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 [2021-10-13 19:44:43,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:44:43,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:44:43,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 19:44:43,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:44:43,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985777830] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:43,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:44:43,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2021-10-13 19:44:43,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258808926] [2021-10-13 19:44:43,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 19:44:43,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:43,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 19:44:43,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-10-13 19:44:43,976 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) [2021-10-13 19:44:44,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:44,821 INFO L93 Difference]: Finished difference Result 119 states and 260 transitions. [2021-10-13 19:44:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 19:44:44,822 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 [2021-10-13 19:44:44,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:44,824 INFO L225 Difference]: With dead ends: 119 [2021-10-13 19:44:44,824 INFO L226 Difference]: Without dead ends: 117 [2021-10-13 19:44:44,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 896.4ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-10-13 19:44:44,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-13 19:44:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2021-10-13 19:44:44,830 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) [2021-10-13 19:44:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 218 transitions. [2021-10-13 19:44:44,831 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 218 transitions. Word has length 13 [2021-10-13 19:44:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:44,832 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 218 transitions. [2021-10-13 19:44:44,832 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) [2021-10-13 19:44:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 218 transitions. [2021-10-13 19:44:44,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 19:44:44,836 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:44,836 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:44,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-13 19:44:45,048 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 [2021-10-13 19:44:45,048 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:45,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:45,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1751381666, now seen corresponding path program 3 times [2021-10-13 19:44:45,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:45,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078346545] [2021-10-13 19:44:45,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:45,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:46,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:46,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078346545] [2021-10-13 19:44:46,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078346545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:46,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367149716] [2021-10-13 19:44:46,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:44:46,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:46,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:46,658 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) [2021-10-13 19:44:46,660 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 [2021-10-13 19:44:46,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:44:46,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:44:46,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 19:44:46,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 19:44:47,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367149716] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:47,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:44:47,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2021-10-13 19:44:47,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879600410] [2021-10-13 19:44:47,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 19:44:47,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:47,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 19:44:47,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-10-13 19:44:47,349 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) [2021-10-13 19:44:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:48,867 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2021-10-13 19:44:48,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 19:44:48,867 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 [2021-10-13 19:44:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:48,868 INFO L225 Difference]: With dead ends: 107 [2021-10-13 19:44:48,868 INFO L226 Difference]: Without dead ends: 99 [2021-10-13 19:44:48,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1716.5ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-10-13 19:44:48,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-13 19:44:48,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2021-10-13 19:44:48,872 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) [2021-10-13 19:44:48,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 194 transitions. [2021-10-13 19:44:48,873 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 194 transitions. Word has length 13 [2021-10-13 19:44:48,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:48,874 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 194 transitions. [2021-10-13 19:44:48,874 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) [2021-10-13 19:44:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 194 transitions. [2021-10-13 19:44:48,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 19:44:48,874 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:48,875 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:48,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 19:44:49,086 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 [2021-10-13 19:44:49,087 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:49,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:49,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1751337955, now seen corresponding path program 6 times [2021-10-13 19:44:49,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:49,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985438023] [2021-10-13 19:44:49,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:49,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:50,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:50,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985438023] [2021-10-13 19:44:50,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985438023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:50,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604157845] [2021-10-13 19:44:50,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:44:50,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:50,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:50,208 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) [2021-10-13 19:44:50,209 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 [2021-10-13 19:44:50,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:44:50,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:44:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 19:44:50,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:51,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604157845] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:51,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:44:51,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 19 [2021-10-13 19:44:51,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511585443] [2021-10-13 19:44:51,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 19:44:51,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:51,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 19:44:51,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-10-13 19:44:51,121 INFO L87 Difference]: Start difference. First operand 91 states and 194 transitions. Second operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2021-10-13 19:44:52,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:52,498 INFO L93 Difference]: Finished difference Result 105 states and 229 transitions. [2021-10-13 19:44:52,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 19:44:52,500 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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 [2021-10-13 19:44:52,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:52,501 INFO L225 Difference]: With dead ends: 105 [2021-10-13 19:44:52,501 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 19:44:52,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1672.8ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:44:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 19:44:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2021-10-13 19:44:52,506 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) [2021-10-13 19:44:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 215 transitions. [2021-10-13 19:44:52,506 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 215 transitions. Word has length 13 [2021-10-13 19:44:52,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:52,507 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 215 transitions. [2021-10-13 19:44:52,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2021-10-13 19:44:52,507 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 215 transitions. [2021-10-13 19:44:52,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 19:44:52,508 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:52,508 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:52,535 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 [2021-10-13 19:44:52,721 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 [2021-10-13 19:44:52,722 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:52,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:52,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1751337956, now seen corresponding path program 4 times [2021-10-13 19:44:52,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:52,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400458263] [2021-10-13 19:44:52,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:52,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:54,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:54,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400458263] [2021-10-13 19:44:54,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400458263] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:54,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153235560] [2021-10-13 19:44:54,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:44:54,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:54,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:54,513 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) [2021-10-13 19:44:54,514 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 [2021-10-13 19:44:54,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:44:54,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:44:54,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 19:44:54,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:44:55,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153235560] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:55,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:44:55,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2021-10-13 19:44:55,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263412509] [2021-10-13 19:44:55,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 19:44:55,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:55,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 19:44:55,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:44:55,215 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) [2021-10-13 19:44:57,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:44:57,300 INFO L93 Difference]: Finished difference Result 131 states and 290 transitions. [2021-10-13 19:44:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 19:44:57,302 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 [2021-10-13 19:44:57,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:44:57,303 INFO L225 Difference]: With dead ends: 131 [2021-10-13 19:44:57,304 INFO L226 Difference]: Without dead ends: 129 [2021-10-13 19:44:57,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2260.6ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 19:44:57,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-13 19:44:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2021-10-13 19:44:57,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 103 states have (on average 2.2427184466019416) internal successors, (231), 104 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:44:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 231 transitions. [2021-10-13 19:44:57,309 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 231 transitions. Word has length 13 [2021-10-13 19:44:57,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:44:57,309 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 231 transitions. [2021-10-13 19:44:57,310 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) [2021-10-13 19:44:57,310 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 231 transitions. [2021-10-13 19:44:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 19:44:57,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:44:57,310 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:44:57,339 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 [2021-10-13 19:44:57,515 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 [2021-10-13 19:44:57,516 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:44:57,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:44:57,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1895388639, now seen corresponding path program 7 times [2021-10-13 19:44:57,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:44:57,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185619497] [2021-10-13 19:44:57,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:44:57,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:44:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:44:58,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:44:58,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185619497] [2021-10-13 19:44:58,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185619497] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:58,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884817498] [2021-10-13 19:44:58,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:44:58,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:44:58,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:44:58,291 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) [2021-10-13 19:44:58,301 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 [2021-10-13 19:44:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:44:58,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 19:44:58,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:44:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:44:58,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884817498] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:44:58,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:44:58,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 19 [2021-10-13 19:44:58,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942201859] [2021-10-13 19:44:58,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 19:44:58,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:44:58,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 19:44:58,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-10-13 19:44:58,962 INFO L87 Difference]: Start difference. First operand 105 states and 231 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) [2021-10-13 19:45:00,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:00,441 INFO L93 Difference]: Finished difference Result 137 states and 288 transitions. [2021-10-13 19:45:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 19:45:00,442 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 14 [2021-10-13 19:45:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:00,443 INFO L225 Difference]: With dead ends: 137 [2021-10-13 19:45:00,443 INFO L226 Difference]: Without dead ends: 133 [2021-10-13 19:45:00,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1603.2ms TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 19:45:00,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-13 19:45:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 95. [2021-10-13 19:45:00,451 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) [2021-10-13 19:45:00,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 202 transitions. [2021-10-13 19:45:00,452 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 202 transitions. Word has length 14 [2021-10-13 19:45:00,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:00,452 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 202 transitions. [2021-10-13 19:45:00,453 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) [2021-10-13 19:45:00,453 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 202 transitions. [2021-10-13 19:45:00,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 19:45:00,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:00,455 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:00,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 19:45:00,667 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 [2021-10-13 19:45:00,668 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:00,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:00,668 INFO L82 PathProgramCache]: Analyzing trace with hash 829995185, now seen corresponding path program 5 times [2021-10-13 19:45:00,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:00,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958500077] [2021-10-13 19:45:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:00,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:45:00,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:45:00,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958500077] [2021-10-13 19:45:00,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958500077] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:00,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407927939] [2021-10-13 19:45:00,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:45:00,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:45:00,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:45:00,750 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) [2021-10-13 19:45:00,786 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 [2021-10-13 19:45:01,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:45:01,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:45:01,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 19:45:01,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:45:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:01,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407927939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:01,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:45:01,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-13 19:45:01,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733941713] [2021-10-13 19:45:01,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 19:45:01,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:45:01,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 19:45:01,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:45:01,257 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) [2021-10-13 19:45:01,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:01,422 INFO L93 Difference]: Finished difference Result 79 states and 156 transitions. [2021-10-13 19:45:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:45:01,423 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 [2021-10-13 19:45:01,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:01,424 INFO L225 Difference]: With dead ends: 79 [2021-10-13 19:45:01,424 INFO L226 Difference]: Without dead ends: 64 [2021-10-13 19:45:01,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-10-13 19:45:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-13 19:45:01,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-13 19:45:01,427 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) [2021-10-13 19:45:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 136 transitions. [2021-10-13 19:45:01,428 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 136 transitions. Word has length 14 [2021-10-13 19:45:01,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:01,428 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 136 transitions. [2021-10-13 19:45:01,428 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) [2021-10-13 19:45:01,429 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 136 transitions. [2021-10-13 19:45:01,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:45:01,429 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:01,429 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:01,470 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 [2021-10-13 19:45:01,630 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 [2021-10-13 19:45:01,630 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:01,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:01,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1373895105, now seen corresponding path program 8 times [2021-10-13 19:45:01,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:01,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782836842] [2021-10-13 19:45:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:01,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:02,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:45:02,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782836842] [2021-10-13 19:45:02,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782836842] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:02,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552228971] [2021-10-13 19:45:02,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:45:02,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:45:02,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:45:02,109 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) [2021-10-13 19:45:02,111 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 [2021-10-13 19:45:02,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:45:02,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:45:02,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 19:45:02,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:45:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 19:45:02,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552228971] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:02,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:45:02,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2021-10-13 19:45:02,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585400519] [2021-10-13 19:45:02,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 19:45:02,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:45:02,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 19:45:02,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:45:02,779 INFO L87 Difference]: Start difference. First operand 64 states and 136 transitions. Second operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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) [2021-10-13 19:45:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:03,456 INFO L93 Difference]: Finished difference Result 106 states and 232 transitions. [2021-10-13 19:45:03,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 19:45:03,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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 [2021-10-13 19:45:03,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:03,457 INFO L225 Difference]: With dead ends: 106 [2021-10-13 19:45:03,458 INFO L226 Difference]: Without dead ends: 106 [2021-10-13 19:45:03,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 806.9ms TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:45:03,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-13 19:45:03,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-10-13 19:45:03,461 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) [2021-10-13 19:45:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 160 transitions. [2021-10-13 19:45:03,462 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 160 transitions. Word has length 15 [2021-10-13 19:45:03,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:03,462 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 160 transitions. [2021-10-13 19:45:03,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 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) [2021-10-13 19:45:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 160 transitions. [2021-10-13 19:45:03,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:45:03,463 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:03,463 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:03,504 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 [2021-10-13 19:45:03,677 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 [2021-10-13 19:45:03,678 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:03,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1373895106, now seen corresponding path program 6 times [2021-10-13 19:45:03,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:03,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637038229] [2021-10-13 19:45:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:03,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:06,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:45:06,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637038229] [2021-10-13 19:45:06,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637038229] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:06,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406273715] [2021-10-13 19:45:06,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:45:06,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:45:06,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:45:06,026 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) [2021-10-13 19:45:06,035 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 [2021-10-13 19:45:06,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:45:06,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:45:06,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 19:45:06,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:45:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:45:07,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406273715] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:07,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:45:07,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2021-10-13 19:45:07,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274559420] [2021-10-13 19:45:07,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 19:45:07,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:45:07,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 19:45:07,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-10-13 19:45:07,071 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) [2021-10-13 19:45:09,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:09,954 INFO L93 Difference]: Finished difference Result 122 states and 270 transitions. [2021-10-13 19:45:09,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 19:45:09,955 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 [2021-10-13 19:45:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:09,957 INFO L225 Difference]: With dead ends: 122 [2021-10-13 19:45:09,957 INFO L226 Difference]: Without dead ends: 122 [2021-10-13 19:45:09,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 3276.1ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 19:45:09,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-13 19:45:09,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 73. [2021-10-13 19:45:09,962 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) [2021-10-13 19:45:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 160 transitions. [2021-10-13 19:45:09,962 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 160 transitions. Word has length 15 [2021-10-13 19:45:09,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:09,962 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 160 transitions. [2021-10-13 19:45:09,963 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) [2021-10-13 19:45:09,963 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 160 transitions. [2021-10-13 19:45:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:45:09,963 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:09,963 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:10,001 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 [2021-10-13 19:45:10,177 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 [2021-10-13 19:45:10,178 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:10,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:10,178 INFO L82 PathProgramCache]: Analyzing trace with hash -547980814, now seen corresponding path program 9 times [2021-10-13 19:45:10,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:10,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814503029] [2021-10-13 19:45:10,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:10,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:10,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:45:10,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814503029] [2021-10-13 19:45:10,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814503029] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:10,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649662818] [2021-10-13 19:45:10,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:45:10,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:45:10,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:45:10,897 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) [2021-10-13 19:45:10,917 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 [2021-10-13 19:45:11,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:45:11,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:45:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 19:45:11,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:45:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 19:45:11,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649662818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:11,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:45:11,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2021-10-13 19:45:11,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415219054] [2021-10-13 19:45:11,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 19:45:11,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:45:11,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 19:45:11,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-10-13 19:45:11,801 INFO L87 Difference]: Start difference. First operand 73 states and 160 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) [2021-10-13 19:45:13,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:13,323 INFO L93 Difference]: Finished difference Result 130 states and 292 transitions. [2021-10-13 19:45:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 19:45:13,323 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 [2021-10-13 19:45:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:13,325 INFO L225 Difference]: With dead ends: 130 [2021-10-13 19:45:13,325 INFO L226 Difference]: Without dead ends: 130 [2021-10-13 19:45:13,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1465.8ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 19:45:13,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-13 19:45:13,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2021-10-13 19:45:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 98 states have (on average 2.336734693877551) internal successors, (229), 99 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:45:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 229 transitions. [2021-10-13 19:45:13,330 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 229 transitions. Word has length 15 [2021-10-13 19:45:13,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:13,331 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 229 transitions. [2021-10-13 19:45:13,331 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) [2021-10-13 19:45:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 229 transitions. [2021-10-13 19:45:13,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:45:13,332 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:13,332 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:13,361 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 [2021-10-13 19:45:13,546 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 [2021-10-13 19:45:13,547 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:13,548 INFO L82 PathProgramCache]: Analyzing trace with hash -547980813, now seen corresponding path program 7 times [2021-10-13 19:45:13,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:13,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418432113] [2021-10-13 19:45:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:13,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:14,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:45:14,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418432113] [2021-10-13 19:45:14,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418432113] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:14,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474541440] [2021-10-13 19:45:14,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:45:14,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:45:14,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:45:14,511 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) [2021-10-13 19:45:14,512 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 [2021-10-13 19:45:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:14,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-13 19:45:14,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:45:15,138 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 [2021-10-13 19:45:15,217 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:45:15,217 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 [2021-10-13 19:45:15,315 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:45:15,316 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 [2021-10-13 19:45:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:15,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474541440] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:15,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:45:15,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-13 19:45:15,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575402697] [2021-10-13 19:45:15,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 19:45:15,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:45:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 19:45:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:45:15,979 INFO L87 Difference]: Start difference. First operand 100 states and 229 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) [2021-10-13 19:45:17,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:17,219 INFO L93 Difference]: Finished difference Result 130 states and 286 transitions. [2021-10-13 19:45:17,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 19:45:17,220 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 [2021-10-13 19:45:17,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:17,221 INFO L225 Difference]: With dead ends: 130 [2021-10-13 19:45:17,221 INFO L226 Difference]: Without dead ends: 122 [2021-10-13 19:45:17,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1701.0ms TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 19:45:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-13 19:45:17,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 100. [2021-10-13 19:45:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 98 states have (on average 2.193877551020408) internal successors, (215), 99 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) [2021-10-13 19:45:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 215 transitions. [2021-10-13 19:45:17,236 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 215 transitions. Word has length 15 [2021-10-13 19:45:17,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:17,237 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 215 transitions. [2021-10-13 19:45:17,238 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) [2021-10-13 19:45:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 215 transitions. [2021-10-13 19:45:17,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:45:17,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:17,238 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:17,282 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 [2021-10-13 19:45:17,453 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 [2021-10-13 19:45:17,454 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:17,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:17,455 INFO L82 PathProgramCache]: Analyzing trace with hash -549335824, now seen corresponding path program 10 times [2021-10-13 19:45:17,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:17,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746205703] [2021-10-13 19:45:17,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:17,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:18,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:45:18,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746205703] [2021-10-13 19:45:18,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746205703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:18,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275625347] [2021-10-13 19:45:18,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:45:18,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:45:18,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:45:18,756 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) [2021-10-13 19:45:18,757 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 [2021-10-13 19:45:19,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:45:19,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:45:19,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 19:45:19,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:45:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:45:19,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275625347] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:19,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:45:19,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 21 [2021-10-13 19:45:19,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878152431] [2021-10-13 19:45:19,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 19:45:19,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:45:19,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 19:45:19,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-10-13 19:45:19,769 INFO L87 Difference]: Start difference. First operand 100 states and 215 transitions. Second operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2021-10-13 19:45:21,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:21,099 INFO L93 Difference]: Finished difference Result 174 states and 382 transitions. [2021-10-13 19:45:21,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 19:45:21,100 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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 [2021-10-13 19:45:21,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:21,101 INFO L225 Difference]: With dead ends: 174 [2021-10-13 19:45:21,101 INFO L226 Difference]: Without dead ends: 164 [2021-10-13 19:45:21,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1458.0ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 19:45:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-13 19:45:21,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 118. [2021-10-13 19:45:21,107 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) [2021-10-13 19:45:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 282 transitions. [2021-10-13 19:45:21,108 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 282 transitions. Word has length 15 [2021-10-13 19:45:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:21,108 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 282 transitions. [2021-10-13 19:45:21,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2021-10-13 19:45:21,108 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 282 transitions. [2021-10-13 19:45:21,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:45:21,109 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:21,109 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:21,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-13 19:45:21,322 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 [2021-10-13 19:45:21,323 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:21,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:21,323 INFO L82 PathProgramCache]: Analyzing trace with hash -549335823, now seen corresponding path program 8 times [2021-10-13 19:45:21,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:21,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360883454] [2021-10-13 19:45:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:21,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:21,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:45:21,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360883454] [2021-10-13 19:45:21,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360883454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:21,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104137288] [2021-10-13 19:45:21,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:45:21,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:45:21,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:45:21,899 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) [2021-10-13 19:45:21,900 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 [2021-10-13 19:45:22,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:45:22,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:45:22,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-13 19:45:22,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:45:22,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:45:22,379 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 [2021-10-13 19:45:22,522 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 [2021-10-13 19:45:22,590 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 19:45:22,590 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 [2021-10-13 19:45:22,686 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 19:45:22,687 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 [2021-10-13 19:45:22,783 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 19:45:22,783 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 [2021-10-13 19:45:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:23,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104137288] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:23,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:45:23,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-13 19:45:23,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392391101] [2021-10-13 19:45:23,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 19:45:23,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:45:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 19:45:23,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:45:23,496 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) [2021-10-13 19:45:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:26,687 INFO L93 Difference]: Finished difference Result 254 states and 610 transitions. [2021-10-13 19:45:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 19:45:26,688 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 [2021-10-13 19:45:26,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:26,689 INFO L225 Difference]: With dead ends: 254 [2021-10-13 19:45:26,689 INFO L226 Difference]: Without dead ends: 238 [2021-10-13 19:45:26,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2876.9ms TimeCoverageRelationStatistics Valid=256, Invalid=2396, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 19:45:26,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-10-13 19:45:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 166. [2021-10-13 19:45:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 164 states have (on average 2.6707317073170733) internal successors, (438), 165 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:45:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 438 transitions. [2021-10-13 19:45:26,699 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 438 transitions. Word has length 15 [2021-10-13 19:45:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:26,699 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 438 transitions. [2021-10-13 19:45:26,700 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) [2021-10-13 19:45:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 438 transitions. [2021-10-13 19:45:26,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:45:26,700 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:26,701 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:26,731 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 [2021-10-13 19:45:26,915 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 [2021-10-13 19:45:26,916 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:26,917 INFO L82 PathProgramCache]: Analyzing trace with hash -591341134, now seen corresponding path program 11 times [2021-10-13 19:45:26,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:26,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564781050] [2021-10-13 19:45:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:26,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:27,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:45:27,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564781050] [2021-10-13 19:45:27,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564781050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:27,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695908715] [2021-10-13 19:45:27,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:45:27,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:45:27,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:45:27,654 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) [2021-10-13 19:45:27,657 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 [2021-10-13 19:45:28,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:45:28,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:45:28,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-13 19:45:28,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:45:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:28,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695908715] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:28,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:45:28,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 23 [2021-10-13 19:45:28,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282335492] [2021-10-13 19:45:28,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 19:45:28,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:45:28,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 19:45:28,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:45:28,893 INFO L87 Difference]: Start difference. First operand 166 states and 438 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 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) [2021-10-13 19:45:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:31,061 INFO L93 Difference]: Finished difference Result 386 states and 956 transitions. [2021-10-13 19:45:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 19:45:31,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 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 [2021-10-13 19:45:31,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:31,065 INFO L225 Difference]: With dead ends: 386 [2021-10-13 19:45:31,066 INFO L226 Difference]: Without dead ends: 374 [2021-10-13 19:45:31,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1857.0ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 19:45:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-10-13 19:45:31,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 214. [2021-10-13 19:45:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 212 states have (on average 2.839622641509434) internal successors, (602), 213 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:45:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 602 transitions. [2021-10-13 19:45:31,078 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 602 transitions. Word has length 15 [2021-10-13 19:45:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:31,079 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 602 transitions. [2021-10-13 19:45:31,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 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) [2021-10-13 19:45:31,079 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 602 transitions. [2021-10-13 19:45:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:45:31,080 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:31,080 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:31,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-13 19:45:31,293 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 [2021-10-13 19:45:31,294 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:31,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:31,294 INFO L82 PathProgramCache]: Analyzing trace with hash -591384843, now seen corresponding path program 9 times [2021-10-13 19:45:31,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:31,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603795947] [2021-10-13 19:45:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:31,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:32,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:45:32,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603795947] [2021-10-13 19:45:32,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603795947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:32,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816230441] [2021-10-13 19:45:32,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:45:32,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:45:32,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:45:32,156 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) [2021-10-13 19:45:32,175 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 [2021-10-13 19:45:32,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:45:32,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:45:32,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-13 19:45:32,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:45:32,893 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 [2021-10-13 19:45:32,985 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-10-13 19:45:32,986 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 [2021-10-13 19:45:33,144 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:45:33,144 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 [2021-10-13 19:45:33,300 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:45:33,301 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 [2021-10-13 19:45:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:34,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816230441] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:34,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:45:34,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-13 19:45:34,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772957478] [2021-10-13 19:45:34,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 19:45:34,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:45:34,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 19:45:34,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:45:34,203 INFO L87 Difference]: Start difference. First operand 214 states and 602 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) [2021-10-13 19:45:37,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:37,042 INFO L93 Difference]: Finished difference Result 316 states and 837 transitions. [2021-10-13 19:45:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 19:45:37,045 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 [2021-10-13 19:45:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:37,048 INFO L225 Difference]: With dead ends: 316 [2021-10-13 19:45:37,048 INFO L226 Difference]: Without dead ends: 310 [2021-10-13 19:45:37,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 2970.0ms TimeCoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 19:45:37,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-10-13 19:45:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 226. [2021-10-13 19:45:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 2.8125) internal successors, (630), 225 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:45:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 630 transitions. [2021-10-13 19:45:37,064 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 630 transitions. Word has length 15 [2021-10-13 19:45:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:37,065 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 630 transitions. [2021-10-13 19:45:37,065 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) [2021-10-13 19:45:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 630 transitions. [2021-10-13 19:45:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:45:37,067 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:37,067 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:37,106 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 [2021-10-13 19:45:37,282 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 [2021-10-13 19:45:37,283 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:37,283 INFO L82 PathProgramCache]: Analyzing trace with hash -358924111, now seen corresponding path program 10 times [2021-10-13 19:45:37,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:37,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499066474] [2021-10-13 19:45:37,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:37,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:38,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:45:38,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499066474] [2021-10-13 19:45:38,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499066474] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:38,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415886513] [2021-10-13 19:45:38,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:45:38,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:45:38,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:45:38,140 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) [2021-10-13 19:45:38,142 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 [2021-10-13 19:45:38,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:45:38,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:45:38,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 19:45:38,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:45:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:45:39,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415886513] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:39,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:45:39,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2021-10-13 19:45:39,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533648043] [2021-10-13 19:45:39,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 19:45:39,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:45:39,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 19:45:39,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-10-13 19:45:39,222 INFO L87 Difference]: Start difference. First operand 226 states and 630 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) [2021-10-13 19:45:40,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:40,367 INFO L93 Difference]: Finished difference Result 268 states and 731 transitions. [2021-10-13 19:45:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 19:45:40,368 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 [2021-10-13 19:45:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:40,371 INFO L225 Difference]: With dead ends: 268 [2021-10-13 19:45:40,371 INFO L226 Difference]: Without dead ends: 254 [2021-10-13 19:45:40,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1221.8ms TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 19:45:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-10-13 19:45:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2021-10-13 19:45:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 246 states have (on average 2.7845528455284554) internal successors, (685), 247 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:45:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 685 transitions. [2021-10-13 19:45:40,380 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 685 transitions. Word has length 16 [2021-10-13 19:45:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:40,381 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 685 transitions. [2021-10-13 19:45:40,381 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) [2021-10-13 19:45:40,381 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 685 transitions. [2021-10-13 19:45:40,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:45:40,382 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:40,382 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:40,424 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 [2021-10-13 19:45:40,595 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 [2021-10-13 19:45:40,596 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:40,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:40,597 INFO L82 PathProgramCache]: Analyzing trace with hash -360279121, now seen corresponding path program 11 times [2021-10-13 19:45:40,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:40,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484075250] [2021-10-13 19:45:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:40,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:42,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:45:42,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484075250] [2021-10-13 19:45:42,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484075250] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:42,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414112396] [2021-10-13 19:45:42,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:45:42,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:45:42,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:45:42,490 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) [2021-10-13 19:45:42,491 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 [2021-10-13 19:45:43,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:45:43,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:45:43,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 19:45:43,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:45:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:45:43,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414112396] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:43,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:45:43,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 23 [2021-10-13 19:45:43,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492462108] [2021-10-13 19:45:43,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 19:45:43,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:45:43,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 19:45:43,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:45:43,803 INFO L87 Difference]: Start difference. First operand 248 states and 685 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) [2021-10-13 19:45:46,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:46,392 INFO L93 Difference]: Finished difference Result 282 states and 742 transitions. [2021-10-13 19:45:46,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 19:45:46,392 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 [2021-10-13 19:45:46,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:46,395 INFO L225 Difference]: With dead ends: 282 [2021-10-13 19:45:46,395 INFO L226 Difference]: Without dead ends: 274 [2021-10-13 19:45:46,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3078.0ms TimeCoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 19:45:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-13 19:45:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 240. [2021-10-13 19:45:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 238 states have (on average 2.735294117647059) internal successors, (651), 239 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:45:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 651 transitions. [2021-10-13 19:45:46,404 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 651 transitions. Word has length 16 [2021-10-13 19:45:46,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:46,404 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 651 transitions. [2021-10-13 19:45:46,404 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) [2021-10-13 19:45:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 651 transitions. [2021-10-13 19:45:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:45:46,405 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:46,405 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:46,442 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 [2021-10-13 19:45:46,619 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 [2021-10-13 19:45:46,620 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:46,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:46,621 INFO L82 PathProgramCache]: Analyzing trace with hash -402284432, now seen corresponding path program 12 times [2021-10-13 19:45:46,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:46,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939159277] [2021-10-13 19:45:46,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:46,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:48,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:45:48,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939159277] [2021-10-13 19:45:48,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939159277] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:48,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435196148] [2021-10-13 19:45:48,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:45:48,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:45:48,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:45:48,110 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) [2021-10-13 19:45:48,111 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 [2021-10-13 19:45:48,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:45:48,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:45:48,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 19:45:48,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:45:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:45:49,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435196148] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:49,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:45:49,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2021-10-13 19:45:49,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477509426] [2021-10-13 19:45:49,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 19:45:49,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:45:49,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 19:45:49,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2021-10-13 19:45:49,338 INFO L87 Difference]: Start difference. First operand 240 states and 651 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) [2021-10-13 19:45:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:51,416 INFO L93 Difference]: Finished difference Result 322 states and 838 transitions. [2021-10-13 19:45:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 19:45:51,416 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 [2021-10-13 19:45:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:51,419 INFO L225 Difference]: With dead ends: 322 [2021-10-13 19:45:51,419 INFO L226 Difference]: Without dead ends: 322 [2021-10-13 19:45:51,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2361.9ms TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 19:45:51,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-10-13 19:45:51,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 240. [2021-10-13 19:45:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 238 states have (on average 2.726890756302521) internal successors, (649), 239 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:45:51,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 649 transitions. [2021-10-13 19:45:51,430 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 649 transitions. Word has length 16 [2021-10-13 19:45:51,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:51,430 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 649 transitions. [2021-10-13 19:45:51,430 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) [2021-10-13 19:45:51,431 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 649 transitions. [2021-10-13 19:45:51,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:45:51,431 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:51,431 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:51,475 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 [2021-10-13 19:45:51,645 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 [2021-10-13 19:45:51,645 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:51,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:51,646 INFO L82 PathProgramCache]: Analyzing trace with hash -402328141, now seen corresponding path program 12 times [2021-10-13 19:45:51,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:51,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123742447] [2021-10-13 19:45:51,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:51,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:53,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:45:53,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123742447] [2021-10-13 19:45:53,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123742447] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:53,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847221626] [2021-10-13 19:45:53,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:45:53,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:45:53,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:45:53,023 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) [2021-10-13 19:45:53,025 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 [2021-10-13 19:45:53,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:45:53,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:45:53,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 19:45:53,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:45:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:45:54,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847221626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:54,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:45:54,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2021-10-13 19:45:54,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790728884] [2021-10-13 19:45:54,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 19:45:54,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:45:54,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 19:45:54,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2021-10-13 19:45:54,341 INFO L87 Difference]: Start difference. First operand 240 states and 649 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) [2021-10-13 19:45:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:56,350 INFO L93 Difference]: Finished difference Result 270 states and 706 transitions. [2021-10-13 19:45:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 19:45:56,350 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 [2021-10-13 19:45:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:56,353 INFO L225 Difference]: With dead ends: 270 [2021-10-13 19:45:56,353 INFO L226 Difference]: Without dead ends: 262 [2021-10-13 19:45:56,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2460.2ms TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 19:45:56,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-13 19:45:56,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 240. [2021-10-13 19:45:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 238 states have (on average 2.7184873949579833) internal successors, (647), 239 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:45:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 647 transitions. [2021-10-13 19:45:56,362 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 647 transitions. Word has length 16 [2021-10-13 19:45:56,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:56,362 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 647 transitions. [2021-10-13 19:45:56,362 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) [2021-10-13 19:45:56,363 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 647 transitions. [2021-10-13 19:45:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:45:56,363 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:56,363 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:56,400 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 [2021-10-13 19:45:56,576 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 [2021-10-13 19:45:56,577 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:56,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:56,577 INFO L82 PathProgramCache]: Analyzing trace with hash 150459233, now seen corresponding path program 13 times [2021-10-13 19:45:56,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:56,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553993759] [2021-10-13 19:45:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:56,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:56,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:45:56,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553993759] [2021-10-13 19:45:56,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553993759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:56,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680718425] [2021-10-13 19:45:56,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:45:56,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:45:56,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:45:56,690 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) [2021-10-13 19:45:56,726 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 [2021-10-13 19:45:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:45:57,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 19:45:57,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:45:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:45:57,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680718425] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:45:57,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:45:57,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-13 19:45:57,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941048098] [2021-10-13 19:45:57,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 19:45:57,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:45:57,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 19:45:57,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-10-13 19:45:57,554 INFO L87 Difference]: Start difference. First operand 240 states and 647 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) [2021-10-13 19:45:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:45:57,679 INFO L93 Difference]: Finished difference Result 242 states and 512 transitions. [2021-10-13 19:45:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:45:57,680 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 [2021-10-13 19:45:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:45:57,681 INFO L225 Difference]: With dead ends: 242 [2021-10-13 19:45:57,681 INFO L226 Difference]: Without dead ends: 140 [2021-10-13 19:45:57,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-10-13 19:45:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-13 19:45:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2021-10-13 19:45:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 132 states have (on average 2.196969696969697) internal successors, (290), 133 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:45:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 290 transitions. [2021-10-13 19:45:57,686 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 290 transitions. Word has length 16 [2021-10-13 19:45:57,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:45:57,687 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 290 transitions. [2021-10-13 19:45:57,687 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) [2021-10-13 19:45:57,687 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 290 transitions. [2021-10-13 19:45:57,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 19:45:57,688 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:45:57,688 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:45:57,726 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 [2021-10-13 19:45:57,903 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 [2021-10-13 19:45:57,904 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:45:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:45:57,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1163506035, now seen corresponding path program 13 times [2021-10-13 19:45:57,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:45:57,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735718477] [2021-10-13 19:45:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:45:57,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:45:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:00,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:46:00,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735718477] [2021-10-13 19:46:00,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735718477] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:00,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300334126] [2021-10-13 19:46:00,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:46:00,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:46:00,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:46:00,388 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) [2021-10-13 19:46:00,389 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 [2021-10-13 19:46:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:01,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 19:46:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:46:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:46:01,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300334126] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:01,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:46:01,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2021-10-13 19:46:01,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501305840] [2021-10-13 19:46:01,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 19:46:01,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:46:01,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 19:46:01,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2021-10-13 19:46:01,878 INFO L87 Difference]: Start difference. First operand 134 states and 290 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) [2021-10-13 19:46:06,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:46:06,128 INFO L93 Difference]: Finished difference Result 192 states and 420 transitions. [2021-10-13 19:46:06,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 19:46:06,128 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 [2021-10-13 19:46:06,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:46:06,130 INFO L225 Difference]: With dead ends: 192 [2021-10-13 19:46:06,130 INFO L226 Difference]: Without dead ends: 192 [2021-10-13 19:46:06,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 4977.8ms TimeCoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 19:46:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-13 19:46:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 122. [2021-10-13 19:46:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 120 states have (on average 2.1666666666666665) internal successors, (260), 121 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:46:06,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 260 transitions. [2021-10-13 19:46:06,135 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 260 transitions. Word has length 17 [2021-10-13 19:46:06,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:46:06,136 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 260 transitions. [2021-10-13 19:46:06,136 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) [2021-10-13 19:46:06,136 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 260 transitions. [2021-10-13 19:46:06,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 19:46:06,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:46:06,137 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:46:06,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-13 19:46:06,351 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 [2021-10-13 19:46:06,352 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:46:06,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:46:06,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1716249699, now seen corresponding path program 14 times [2021-10-13 19:46:06,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:46:06,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165994441] [2021-10-13 19:46:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:46:06,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:46:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 19:46:06,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:46:06,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165994441] [2021-10-13 19:46:06,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165994441] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:06,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274102629] [2021-10-13 19:46:06,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:46:06,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:46:06,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:46:06,419 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) [2021-10-13 19:46:06,441 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 [2021-10-13 19:46:07,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:46:07,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:46:07,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 19:46:07,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:46:07,246 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-10-13 19:46:07,246 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 [2021-10-13 19:46:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 19:46:07,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274102629] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:07,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:46:07,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 8] total 10 [2021-10-13 19:46:07,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698967350] [2021-10-13 19:46:07,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:46:07,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:46:07,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:46:07,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:46:07,291 INFO L87 Difference]: Start difference. First operand 122 states and 260 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) [2021-10-13 19:46:07,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:46:07,473 INFO L93 Difference]: Finished difference Result 212 states and 475 transitions. [2021-10-13 19:46:07,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:46:07,473 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 17 [2021-10-13 19:46:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:46:07,475 INFO L225 Difference]: With dead ends: 212 [2021-10-13 19:46:07,475 INFO L226 Difference]: Without dead ends: 202 [2021-10-13 19:46:07,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:46:07,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-10-13 19:46:07,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 144. [2021-10-13 19:46:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 142 states have (on average 2.3309859154929575) internal successors, (331), 143 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:46:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 331 transitions. [2021-10-13 19:46:07,481 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 331 transitions. Word has length 17 [2021-10-13 19:46:07,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:46:07,481 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 331 transitions. [2021-10-13 19:46:07,482 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) [2021-10-13 19:46:07,482 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 331 transitions. [2021-10-13 19:46:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 19:46:07,482 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:46:07,482 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:46:07,526 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 [2021-10-13 19:46:07,695 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 [2021-10-13 19:46:07,695 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:46:07,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:46:07,696 INFO L82 PathProgramCache]: Analyzing trace with hash 412731536, now seen corresponding path program 15 times [2021-10-13 19:46:07,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:46:07,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438239295] [2021-10-13 19:46:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:46:07,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:46:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:08,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:46:08,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438239295] [2021-10-13 19:46:08,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438239295] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:08,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344983966] [2021-10-13 19:46:08,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:46:08,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:46:08,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:46:08,501 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) [2021-10-13 19:46:08,502 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 [2021-10-13 19:46:09,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:46:09,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:46:09,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-13 19:46:09,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:46:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:10,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344983966] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:10,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:46:10,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2021-10-13 19:46:10,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141853579] [2021-10-13 19:46:10,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 19:46:10,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:46:10,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 19:46:10,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-10-13 19:46:10,314 INFO L87 Difference]: Start difference. First operand 144 states and 331 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) [2021-10-13 19:46:11,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:46:11,781 INFO L93 Difference]: Finished difference Result 232 states and 569 transitions. [2021-10-13 19:46:11,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 19:46:11,782 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 [2021-10-13 19:46:11,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:46:11,784 INFO L225 Difference]: With dead ends: 232 [2021-10-13 19:46:11,784 INFO L226 Difference]: Without dead ends: 232 [2021-10-13 19:46:11,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1678.6ms TimeCoverageRelationStatistics Valid=214, Invalid=1678, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 19:46:11,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-10-13 19:46:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 176. [2021-10-13 19:46:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 174 states have (on average 2.557471264367816) internal successors, (445), 175 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:46:11,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 445 transitions. [2021-10-13 19:46:11,791 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 445 transitions. Word has length 17 [2021-10-13 19:46:11,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:46:11,791 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 445 transitions. [2021-10-13 19:46:11,792 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) [2021-10-13 19:46:11,792 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 445 transitions. [2021-10-13 19:46:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 19:46:11,792 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:46:11,792 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:46:11,821 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 [2021-10-13 19:46:12,000 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 [2021-10-13 19:46:12,001 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:46:12,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:46:12,001 INFO L82 PathProgramCache]: Analyzing trace with hash 327310834, now seen corresponding path program 16 times [2021-10-13 19:46:12,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:46:12,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824546872] [2021-10-13 19:46:12,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:46:12,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:46:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:12,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:46:12,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824546872] [2021-10-13 19:46:12,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824546872] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:12,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483786955] [2021-10-13 19:46:12,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:46:12,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:46:12,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:46:12,253 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) [2021-10-13 19:46:12,254 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 [2021-10-13 19:46:13,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:46:13,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:46:13,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 19:46:13,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:46:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:13,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483786955] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:13,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:46:13,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-13 19:46:13,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180320389] [2021-10-13 19:46:13,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 19:46:13,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:46:13,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 19:46:13,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-10-13 19:46:13,464 INFO L87 Difference]: Start difference. First operand 176 states and 445 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) [2021-10-13 19:46:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:46:13,860 INFO L93 Difference]: Finished difference Result 170 states and 430 transitions. [2021-10-13 19:46:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 19:46:13,861 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 [2021-10-13 19:46:13,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:46:13,883 INFO L225 Difference]: With dead ends: 170 [2021-10-13 19:46:13,883 INFO L226 Difference]: Without dead ends: 153 [2021-10-13 19:46:13,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 608.2ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:46:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-13 19:46:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-10-13 19:46:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 151 states have (on average 2.6953642384105962) internal successors, (407), 152 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:46:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 407 transitions. [2021-10-13 19:46:13,888 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 407 transitions. Word has length 17 [2021-10-13 19:46:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:46:13,888 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 407 transitions. [2021-10-13 19:46:13,889 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) [2021-10-13 19:46:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 407 transitions. [2021-10-13 19:46:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:46:13,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:46:13,889 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:46:13,929 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 [2021-10-13 19:46:14,102 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 [2021-10-13 19:46:14,103 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:46:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:46:14,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1240447919, now seen corresponding path program 14 times [2021-10-13 19:46:14,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:46:14,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489750124] [2021-10-13 19:46:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:46:14,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:46:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:14,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:46:14,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489750124] [2021-10-13 19:46:14,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489750124] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:14,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978634596] [2021-10-13 19:46:14,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:46:14,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:46:14,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:46:14,737 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) [2021-10-13 19:46:14,740 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 [2021-10-13 19:46:15,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:46:15,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:46:15,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 19:46:15,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:46:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:46:16,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978634596] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:16,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:46:16,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2021-10-13 19:46:16,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178103915] [2021-10-13 19:46:16,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 19:46:16,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:46:16,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 19:46:16,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-10-13 19:46:16,127 INFO L87 Difference]: Start difference. First operand 153 states and 407 transitions. Second operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2021-10-13 19:46:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:46:17,276 INFO L93 Difference]: Finished difference Result 199 states and 509 transitions. [2021-10-13 19:46:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 19:46:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 [2021-10-13 19:46:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:46:17,279 INFO L225 Difference]: With dead ends: 199 [2021-10-13 19:46:17,279 INFO L226 Difference]: Without dead ends: 199 [2021-10-13 19:46:17,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1385.5ms TimeCoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 19:46:17,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-10-13 19:46:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2021-10-13 19:46:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 2.7185185185185183) internal successors, (367), 136 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:46:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 367 transitions. [2021-10-13 19:46:17,285 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 367 transitions. Word has length 18 [2021-10-13 19:46:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:46:17,285 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 367 transitions. [2021-10-13 19:46:17,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2021-10-13 19:46:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 367 transitions. [2021-10-13 19:46:17,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:46:17,286 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:46:17,286 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:46:17,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-13 19:46:17,497 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 [2021-10-13 19:46:17,498 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:46:17,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:46:17,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1707595726, now seen corresponding path program 17 times [2021-10-13 19:46:17,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:46:17,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664517587] [2021-10-13 19:46:17,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:46:17,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:46:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:19,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:46:19,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664517587] [2021-10-13 19:46:19,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664517587] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:19,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816944187] [2021-10-13 19:46:19,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:46:19,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:46:19,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:46:19,718 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) [2021-10-13 19:46:19,719 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 [2021-10-13 19:46:20,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 19:46:20,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:46:20,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-13 19:46:20,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:46:20,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:46:20,595 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 [2021-10-13 19:46:20,816 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 [2021-10-13 19:46:20,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:46:20,904 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 [2021-10-13 19:46:21,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:46:21,013 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 [2021-10-13 19:46:21,109 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:46:21,110 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 [2021-10-13 19:46:21,206 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:46:21,207 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 [2021-10-13 19:46:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:22,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816944187] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:22,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:46:22,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-13 19:46:22,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104762442] [2021-10-13 19:46:22,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:46:22,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:46:22,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:46:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:46:22,087 INFO L87 Difference]: Start difference. First operand 137 states and 367 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) [2021-10-13 19:46:24,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:46:24,680 INFO L93 Difference]: Finished difference Result 327 states and 823 transitions. [2021-10-13 19:46:24,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 19:46:24,680 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 [2021-10-13 19:46:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:46:24,682 INFO L225 Difference]: With dead ends: 327 [2021-10-13 19:46:24,683 INFO L226 Difference]: Without dead ends: 327 [2021-10-13 19:46:24,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2906.2ms TimeCoverageRelationStatistics Valid=229, Invalid=2321, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 19:46:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-10-13 19:46:24,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 164. [2021-10-13 19:46:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 162 states have (on average 2.802469135802469) internal successors, (454), 163 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:46:24,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 454 transitions. [2021-10-13 19:46:24,689 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 454 transitions. Word has length 18 [2021-10-13 19:46:24,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:46:24,689 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 454 transitions. [2021-10-13 19:46:24,690 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) [2021-10-13 19:46:24,690 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 454 transitions. [2021-10-13 19:46:24,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:46:24,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:46:24,690 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:46:24,717 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 [2021-10-13 19:46:24,891 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 [2021-10-13 19:46:24,891 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:46:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:46:24,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1285263489, now seen corresponding path program 18 times [2021-10-13 19:46:24,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:46:24,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501909459] [2021-10-13 19:46:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:46:24,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:46:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:25,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:46:25,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501909459] [2021-10-13 19:46:25,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501909459] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:25,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549698498] [2021-10-13 19:46:25,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:46:25,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:46:25,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:46:25,497 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) [2021-10-13 19:46:25,514 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 [2021-10-13 19:46:26,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:46:26,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:46:26,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-13 19:46:26,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:46:26,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:46:26,354 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 [2021-10-13 19:46:26,598 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 [2021-10-13 19:46:26,667 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 [2021-10-13 19:46:26,737 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 [2021-10-13 19:46:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:27,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549698498] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:27,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:46:27,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 28 [2021-10-13 19:46:27,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863981901] [2021-10-13 19:46:27,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:46:27,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:46:27,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:46:27,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:46:27,588 INFO L87 Difference]: Start difference. First operand 164 states and 454 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) [2021-10-13 19:46:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:46:28,998 INFO L93 Difference]: Finished difference Result 449 states and 1152 transitions. [2021-10-13 19:46:28,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 19:46:28,999 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 [2021-10-13 19:46:28,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:46:29,002 INFO L225 Difference]: With dead ends: 449 [2021-10-13 19:46:29,003 INFO L226 Difference]: Without dead ends: 447 [2021-10-13 19:46:29,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1589.8ms TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 19:46:29,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-10-13 19:46:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 301. [2021-10-13 19:46:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 299 states have (on average 2.9899665551839463) internal successors, (894), 300 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:46:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 894 transitions. [2021-10-13 19:46:29,014 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 894 transitions. Word has length 18 [2021-10-13 19:46:29,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:46:29,014 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 894 transitions. [2021-10-13 19:46:29,014 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) [2021-10-13 19:46:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 894 transitions. [2021-10-13 19:46:29,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:46:29,015 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:46:29,015 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:46:29,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-13 19:46:29,229 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 [2021-10-13 19:46:29,230 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:46:29,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:46:29,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1285263488, now seen corresponding path program 15 times [2021-10-13 19:46:29,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:46:29,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400602165] [2021-10-13 19:46:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:46:29,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:46:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:29,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:46:29,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400602165] [2021-10-13 19:46:29,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400602165] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:29,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388818822] [2021-10-13 19:46:29,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:46:29,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:46:29,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:46:29,898 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) [2021-10-13 19:46:29,917 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 [2021-10-13 19:46:30,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:46:30,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:46:30,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-13 19:46:30,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:46:30,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:46:30,873 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 [2021-10-13 19:46:31,102 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 [2021-10-13 19:46:31,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-13 19:46:31,243 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 [2021-10-13 19:46:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:32,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388818822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:32,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:46:32,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 19:46:32,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47062737] [2021-10-13 19:46:32,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 19:46:32,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:46:32,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 19:46:32,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2021-10-13 19:46:32,107 INFO L87 Difference]: Start difference. First operand 301 states and 894 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) [2021-10-13 19:46:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:46:34,640 INFO L93 Difference]: Finished difference Result 299 states and 873 transitions. [2021-10-13 19:46:34,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 19:46:34,640 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 [2021-10-13 19:46:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:46:34,643 INFO L225 Difference]: With dead ends: 299 [2021-10-13 19:46:34,643 INFO L226 Difference]: Without dead ends: 281 [2021-10-13 19:46:34,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 2276.7ms TimeCoverageRelationStatistics Valid=211, Invalid=2045, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 19:46:34,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-10-13 19:46:34,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 279. [2021-10-13 19:46:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 277 states have (on average 3.0216606498194944) internal successors, (837), 278 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:46:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 837 transitions. [2021-10-13 19:46:34,651 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 837 transitions. Word has length 18 [2021-10-13 19:46:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:46:34,651 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 837 transitions. [2021-10-13 19:46:34,651 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) [2021-10-13 19:46:34,651 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 837 transitions. [2021-10-13 19:46:34,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:46:34,652 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:46:34,652 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:46:34,681 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 [2021-10-13 19:46:34,861 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 [2021-10-13 19:46:34,861 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:46:34,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:46:34,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1327268799, now seen corresponding path program 19 times [2021-10-13 19:46:34,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:46:34,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947046595] [2021-10-13 19:46:34,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:46:34,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:46:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:35,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:46:35,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947046595] [2021-10-13 19:46:35,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947046595] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:35,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776182098] [2021-10-13 19:46:35,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:46:35,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:46:35,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:46:35,524 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) [2021-10-13 19:46:35,548 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 [2021-10-13 19:46:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:36,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-13 19:46:36,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:46:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:37,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776182098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:37,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:46:37,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 29 [2021-10-13 19:46:37,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681801373] [2021-10-13 19:46:37,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:46:37,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:46:37,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:46:37,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:46:37,711 INFO L87 Difference]: Start difference. First operand 279 states and 837 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) [2021-10-13 19:46:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:46:40,829 INFO L93 Difference]: Finished difference Result 835 states and 2395 transitions. [2021-10-13 19:46:40,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-13 19:46:40,830 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 [2021-10-13 19:46:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:46:40,837 INFO L225 Difference]: With dead ends: 835 [2021-10-13 19:46:40,837 INFO L226 Difference]: Without dead ends: 833 [2021-10-13 19:46:40,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 2393.8ms TimeCoverageRelationStatistics Valid=307, Invalid=3353, Unknown=0, NotChecked=0, Total=3660 [2021-10-13 19:46:40,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-10-13 19:46:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 423. [2021-10-13 19:46:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 421 states have (on average 3.489311163895487) internal successors, (1469), 422 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:46:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1469 transitions. [2021-10-13 19:46:40,861 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1469 transitions. Word has length 18 [2021-10-13 19:46:40,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:46:40,861 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 1469 transitions. [2021-10-13 19:46:40,861 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) [2021-10-13 19:46:40,861 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1469 transitions. [2021-10-13 19:46:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:46:40,862 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:46:40,862 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:46:40,906 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 [2021-10-13 19:46:41,075 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 [2021-10-13 19:46:41,076 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:46:41,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:46:41,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1327268798, now seen corresponding path program 16 times [2021-10-13 19:46:41,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:46:41,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333763642] [2021-10-13 19:46:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:46:41,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:46:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:42,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:46:42,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333763642] [2021-10-13 19:46:42,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333763642] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:42,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725226033] [2021-10-13 19:46:42,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:46:42,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:46:42,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:46:42,400 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) [2021-10-13 19:46:42,401 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 [2021-10-13 19:46:43,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:46:43,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:46:43,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 19:46:43,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:46:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:46:44,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725226033] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:44,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:46:44,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 27 [2021-10-13 19:46:44,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679204656] [2021-10-13 19:46:44,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 19:46:44,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:46:44,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 19:46:44,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-10-13 19:46:44,138 INFO L87 Difference]: Start difference. First operand 423 states and 1469 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) [2021-10-13 19:46:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:46:46,338 INFO L93 Difference]: Finished difference Result 601 states and 1878 transitions. [2021-10-13 19:46:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 19:46:46,339 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 18 [2021-10-13 19:46:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:46:46,342 INFO L225 Difference]: With dead ends: 601 [2021-10-13 19:46:46,342 INFO L226 Difference]: Without dead ends: 593 [2021-10-13 19:46:46,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2356.0ms TimeCoverageRelationStatistics Valid=168, Invalid=1812, Unknown=0, NotChecked=0, Total=1980 [2021-10-13 19:46:46,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-10-13 19:46:46,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 479. [2021-10-13 19:46:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 477 states have (on average 3.4360587002096437) internal successors, (1639), 478 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:46:46,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1639 transitions. [2021-10-13 19:46:46,359 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1639 transitions. Word has length 18 [2021-10-13 19:46:46,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:46:46,360 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1639 transitions. [2021-10-13 19:46:46,360 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) [2021-10-13 19:46:46,360 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1639 transitions. [2021-10-13 19:46:46,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:46:46,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:46:46,361 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:46:46,402 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 [2021-10-13 19:46:46,574 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 [2021-10-13 19:46:46,575 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:46:46,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:46:46,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1328623809, now seen corresponding path program 20 times [2021-10-13 19:46:46,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:46:46,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428104722] [2021-10-13 19:46:46,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:46:46,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:46:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:47,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:46:47,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428104722] [2021-10-13 19:46:47,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428104722] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:47,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234060492] [2021-10-13 19:46:47,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:46:47,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:46:47,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:46:47,203 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) [2021-10-13 19:46:47,225 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 [2021-10-13 19:46:48,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:46:48,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:46:48,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-13 19:46:48,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:46:48,373 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 [2021-10-13 19:46:48,441 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 [2021-10-13 19:46:48,529 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 [2021-10-13 19:46:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:49,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234060492] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:49,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:46:49,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-13 19:46:49,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883413475] [2021-10-13 19:46:49,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:46:49,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:46:49,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:46:49,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:46:49,329 INFO L87 Difference]: Start difference. First operand 479 states and 1639 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) [2021-10-13 19:46:49,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:46:49,873 INFO L93 Difference]: Finished difference Result 445 states and 1424 transitions. [2021-10-13 19:46:49,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 19:46:49,874 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 [2021-10-13 19:46:49,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:46:49,878 INFO L225 Difference]: With dead ends: 445 [2021-10-13 19:46:49,878 INFO L226 Difference]: Without dead ends: 439 [2021-10-13 19:46:49,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1027.0ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 19:46:49,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-10-13 19:46:49,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 419. [2021-10-13 19:46:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 417 states have (on average 3.26378896882494) internal successors, (1361), 418 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:46:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1361 transitions. [2021-10-13 19:46:49,891 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1361 transitions. Word has length 18 [2021-10-13 19:46:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:46:49,891 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 1361 transitions. [2021-10-13 19:46:49,891 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) [2021-10-13 19:46:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1361 transitions. [2021-10-13 19:46:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:46:49,892 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:46:49,892 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:46:49,936 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 [2021-10-13 19:46:50,118 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 [2021-10-13 19:46:50,118 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:46:50,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:46:50,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1328667519, now seen corresponding path program 21 times [2021-10-13 19:46:50,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:46:50,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687414003] [2021-10-13 19:46:50,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:46:50,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:46:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:51,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:46:51,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687414003] [2021-10-13 19:46:51,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687414003] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:51,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475659913] [2021-10-13 19:46:51,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:46:51,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:46:51,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:46:51,064 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) [2021-10-13 19:46:51,081 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 [2021-10-13 19:46:52,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:46:52,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:46:52,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-13 19:46:52,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:46:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:53,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475659913] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:53,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:46:53,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-13 19:46:53,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357055063] [2021-10-13 19:46:53,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:46:53,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:46:53,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:46:53,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:46:53,309 INFO L87 Difference]: Start difference. First operand 419 states and 1361 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) [2021-10-13 19:46:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:46:56,083 INFO L93 Difference]: Finished difference Result 687 states and 2133 transitions. [2021-10-13 19:46:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 19:46:56,084 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 [2021-10-13 19:46:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:46:56,088 INFO L225 Difference]: With dead ends: 687 [2021-10-13 19:46:56,088 INFO L226 Difference]: Without dead ends: 685 [2021-10-13 19:46:56,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 3020.8ms TimeCoverageRelationStatistics Valid=374, Invalid=2382, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 19:46:56,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-10-13 19:46:56,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 457. [2021-10-13 19:46:56,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 455 states have (on average 3.402197802197802) internal successors, (1548), 456 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:46:56,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1548 transitions. [2021-10-13 19:46:56,106 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1548 transitions. Word has length 18 [2021-10-13 19:46:56,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:46:56,106 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1548 transitions. [2021-10-13 19:46:56,106 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) [2021-10-13 19:46:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1548 transitions. [2021-10-13 19:46:56,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:46:56,107 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:46:56,108 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:46:56,145 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 [2021-10-13 19:46:56,321 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 [2021-10-13 19:46:56,322 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:46:56,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:46:56,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1328667518, now seen corresponding path program 17 times [2021-10-13 19:46:56,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:46:56,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476804151] [2021-10-13 19:46:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:46:56,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:46:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:46:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:57,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:46:57,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476804151] [2021-10-13 19:46:57,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476804151] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:57,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537886651] [2021-10-13 19:46:57,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:46:57,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:46:57,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:46:57,014 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) [2021-10-13 19:46:57,030 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 [2021-10-13 19:46:58,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:46:58,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:46:58,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-13 19:46:58,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:46:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:46:59,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537886651] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:46:59,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:46:59,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-13 19:46:59,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462507436] [2021-10-13 19:46:59,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:46:59,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:46:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:46:59,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:46:59,159 INFO L87 Difference]: Start difference. First operand 457 states and 1548 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) [2021-10-13 19:47:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:47:01,103 INFO L93 Difference]: Finished difference Result 395 states and 1263 transitions. [2021-10-13 19:47:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 19:47:01,104 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 [2021-10-13 19:47:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:47:01,107 INFO L225 Difference]: With dead ends: 395 [2021-10-13 19:47:01,107 INFO L226 Difference]: Without dead ends: 369 [2021-10-13 19:47:01,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2401.5ms TimeCoverageRelationStatistics Valid=239, Invalid=2017, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 19:47:01,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-10-13 19:47:01,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2021-10-13 19:47:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 367 states have (on average 3.329700272479564) internal successors, (1222), 368 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:47:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1222 transitions. [2021-10-13 19:47:01,119 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1222 transitions. Word has length 18 [2021-10-13 19:47:01,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:47:01,119 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1222 transitions. [2021-10-13 19:47:01,119 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) [2021-10-13 19:47:01,119 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1222 transitions. [2021-10-13 19:47:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:47:01,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:47:01,120 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:47:01,167 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 [2021-10-13 19:47:01,334 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 [2021-10-13 19:47:01,335 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:47:01,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:47:01,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1665533887, now seen corresponding path program 22 times [2021-10-13 19:47:01,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:47:01,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696874793] [2021-10-13 19:47:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:47:01,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:47:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:47:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:01,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:47:01,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696874793] [2021-10-13 19:47:01,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696874793] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:01,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194486959] [2021-10-13 19:47:01,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:47:01,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:47:01,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:47:01,847 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) [2021-10-13 19:47:01,851 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 [2021-10-13 19:47:02,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:47:02,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:47:02,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 19:47:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:47:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 19:47:03,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194486959] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:03,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:47:03,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 24 [2021-10-13 19:47:03,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080796774] [2021-10-13 19:47:03,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 19:47:03,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:47:03,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 19:47:03,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:47:03,523 INFO L87 Difference]: Start difference. First operand 369 states and 1222 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) [2021-10-13 19:47:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:47:06,969 INFO L93 Difference]: Finished difference Result 1343 states and 4253 transitions. [2021-10-13 19:47:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-13 19:47:06,970 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 18 [2021-10-13 19:47:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:47:06,980 INFO L225 Difference]: With dead ends: 1343 [2021-10-13 19:47:06,980 INFO L226 Difference]: Without dead ends: 1337 [2021-10-13 19:47:06,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 2553.5ms TimeCoverageRelationStatistics Valid=374, Invalid=3658, Unknown=0, NotChecked=0, Total=4032 [2021-10-13 19:47:06,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-10-13 19:47:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 681. [2021-10-13 19:47:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 679 states have (on average 3.7820324005891015) internal successors, (2568), 680 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:47:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 2568 transitions. [2021-10-13 19:47:07,006 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 2568 transitions. Word has length 18 [2021-10-13 19:47:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:47:07,007 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 2568 transitions. [2021-10-13 19:47:07,007 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) [2021-10-13 19:47:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 2568 transitions. [2021-10-13 19:47:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:47:07,008 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:47:07,008 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:47:07,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-10-13 19:47:07,216 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 [2021-10-13 19:47:07,217 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:47:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:47:07,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1665533888, now seen corresponding path program 18 times [2021-10-13 19:47:07,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:47:07,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302096752] [2021-10-13 19:47:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:47:07,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:47:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:47:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:08,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:47:08,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302096752] [2021-10-13 19:47:08,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302096752] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:08,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322938200] [2021-10-13 19:47:08,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:47:08,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:47:08,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:47:08,477 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) [2021-10-13 19:47:08,478 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 [2021-10-13 19:47:09,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:47:09,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:47:09,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-13 19:47:09,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:47:09,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:47:09,668 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 [2021-10-13 19:47:09,969 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 [2021-10-13 19:47:10,064 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 [2021-10-13 19:47:10,176 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 [2021-10-13 19:47:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:11,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322938200] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:11,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:47:11,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 19:47:11,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553872788] [2021-10-13 19:47:11,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 19:47:11,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:47:11,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 19:47:11,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-10-13 19:47:11,100 INFO L87 Difference]: Start difference. First operand 681 states and 2568 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) [2021-10-13 19:47:13,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:47:13,967 INFO L93 Difference]: Finished difference Result 1099 states and 3693 transitions. [2021-10-13 19:47:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 19:47:13,968 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 [2021-10-13 19:47:13,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:47:13,975 INFO L225 Difference]: With dead ends: 1099 [2021-10-13 19:47:13,975 INFO L226 Difference]: Without dead ends: 1071 [2021-10-13 19:47:13,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3181.7ms TimeCoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2021-10-13 19:47:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-10-13 19:47:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 873. [2021-10-13 19:47:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 871 states have (on average 3.65097588978186) internal successors, (3180), 872 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:47:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 3180 transitions. [2021-10-13 19:47:14,030 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 3180 transitions. Word has length 18 [2021-10-13 19:47:14,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:47:14,030 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 3180 transitions. [2021-10-13 19:47:14,030 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) [2021-10-13 19:47:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 3180 transitions. [2021-10-13 19:47:14,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:47:14,032 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:47:14,032 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:47:14,076 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 [2021-10-13 19:47:14,245 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 [2021-10-13 19:47:14,246 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:47:14,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:47:14,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1664135167, now seen corresponding path program 23 times [2021-10-13 19:47:14,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:47:14,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793456946] [2021-10-13 19:47:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:47:14,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:47:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:47:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:14,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:47:14,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793456946] [2021-10-13 19:47:14,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793456946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:14,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898542005] [2021-10-13 19:47:14,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:47:14,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:47:14,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:47:14,761 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) [2021-10-13 19:47:14,763 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 [2021-10-13 19:47:15,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:47:15,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:47:15,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 19:47:15,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:47:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:16,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898542005] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:16,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:47:16,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-13 19:47:16,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870134730] [2021-10-13 19:47:16,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:47:16,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:47:16,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:47:16,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:47:16,816 INFO L87 Difference]: Start difference. First operand 873 states and 3180 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) [2021-10-13 19:47:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:47:20,814 INFO L93 Difference]: Finished difference Result 561 states and 1482 transitions. [2021-10-13 19:47:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 19:47:20,815 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 [2021-10-13 19:47:20,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:47:20,817 INFO L225 Difference]: With dead ends: 561 [2021-10-13 19:47:20,817 INFO L226 Difference]: Without dead ends: 515 [2021-10-13 19:47:20,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 3640.5ms TimeCoverageRelationStatistics Valid=485, Invalid=3937, Unknown=0, NotChecked=0, Total=4422 [2021-10-13 19:47:20,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-10-13 19:47:20,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 363. [2021-10-13 19:47:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 361 states have (on average 2.850415512465374) internal successors, (1029), 362 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:47:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1029 transitions. [2021-10-13 19:47:20,827 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1029 transitions. Word has length 18 [2021-10-13 19:47:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:47:20,827 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1029 transitions. [2021-10-13 19:47:20,827 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) [2021-10-13 19:47:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1029 transitions. [2021-10-13 19:47:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:47:20,828 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:47:20,828 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:47:20,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-13 19:47:21,028 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 [2021-10-13 19:47:21,029 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:47:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:47:21,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1622175024, now seen corresponding path program 24 times [2021-10-13 19:47:21,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:47:21,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855485370] [2021-10-13 19:47:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:47:21,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:47:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:47:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:47:21,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:47:21,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855485370] [2021-10-13 19:47:21,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855485370] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:21,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311663806] [2021-10-13 19:47:21,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:47:21,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:47:21,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:47:21,149 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) [2021-10-13 19:47:21,171 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 [2021-10-13 19:47:22,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 19:47:22,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:47:22,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 19:47:22,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:47:22,947 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-10-13 19:47:22,947 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 [2021-10-13 19:47:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:22,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311663806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:22,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:47:22,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 24 [2021-10-13 19:47:22,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660945036] [2021-10-13 19:47:22,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 19:47:22,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:47:22,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 19:47:22,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:47:22,984 INFO L87 Difference]: Start difference. First operand 363 states and 1029 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) [2021-10-13 19:47:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:47:23,922 INFO L93 Difference]: Finished difference Result 343 states and 907 transitions. [2021-10-13 19:47:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 19:47:23,923 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 [2021-10-13 19:47:23,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:47:23,925 INFO L225 Difference]: With dead ends: 343 [2021-10-13 19:47:23,925 INFO L226 Difference]: Without dead ends: 305 [2021-10-13 19:47:23,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 913.0ms TimeCoverageRelationStatistics Valid=305, Invalid=1501, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 19:47:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-10-13 19:47:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 285. [2021-10-13 19:47:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 283 states have (on average 2.8409893992932864) internal successors, (804), 284 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:47:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 804 transitions. [2021-10-13 19:47:23,933 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 804 transitions. Word has length 18 [2021-10-13 19:47:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:47:23,933 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 804 transitions. [2021-10-13 19:47:23,933 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) [2021-10-13 19:47:23,933 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 804 transitions. [2021-10-13 19:47:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:47:23,934 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:47:23,934 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:47:23,974 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 [2021-10-13 19:47:24,148 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 [2021-10-13 19:47:24,149 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:47:24,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:47:24,149 INFO L82 PathProgramCache]: Analyzing trace with hash -46863359, now seen corresponding path program 25 times [2021-10-13 19:47:24,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:47:24,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573830732] [2021-10-13 19:47:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:47:24,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:47:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:47:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:24,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:47:24,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573830732] [2021-10-13 19:47:24,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573830732] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:24,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211795957] [2021-10-13 19:47:24,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:47:24,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:47:24,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:47:24,622 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) [2021-10-13 19:47:24,623 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 [2021-10-13 19:47:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:47:25,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-13 19:47:25,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:47:25,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:47:25,840 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 [2021-10-13 19:47:26,093 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 [2021-10-13 19:47:26,169 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:47:26,169 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 [2021-10-13 19:47:26,296 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:47:26,296 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 [2021-10-13 19:47:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:27,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211795957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:27,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:47:27,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-13 19:47:27,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11444911] [2021-10-13 19:47:27,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:47:27,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:47:27,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:47:27,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:47:27,131 INFO L87 Difference]: Start difference. First operand 285 states and 804 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) [2021-10-13 19:47:28,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:47:28,059 INFO L93 Difference]: Finished difference Result 319 states and 851 transitions. [2021-10-13 19:47:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 19:47:28,060 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 [2021-10-13 19:47:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:47:28,062 INFO L225 Difference]: With dead ends: 319 [2021-10-13 19:47:28,062 INFO L226 Difference]: Without dead ends: 315 [2021-10-13 19:47:28,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1384.0ms TimeCoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 19:47:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-10-13 19:47:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 283. [2021-10-13 19:47:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 281 states have (on average 2.829181494661922) internal successors, (795), 282 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:47:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 795 transitions. [2021-10-13 19:47:28,070 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 795 transitions. Word has length 18 [2021-10-13 19:47:28,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:47:28,071 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 795 transitions. [2021-10-13 19:47:28,071 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) [2021-10-13 19:47:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 795 transitions. [2021-10-13 19:47:28,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:47:28,072 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:47:28,072 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:47:28,104 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 [2021-10-13 19:47:28,284 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 [2021-10-13 19:47:28,285 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:47:28,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:47:28,286 INFO L82 PathProgramCache]: Analyzing trace with hash -46863358, now seen corresponding path program 19 times [2021-10-13 19:47:28,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:47:28,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137063431] [2021-10-13 19:47:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:47:28,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:47:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:47:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:29,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:47:29,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137063431] [2021-10-13 19:47:29,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137063431] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:29,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571105808] [2021-10-13 19:47:29,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:47:29,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:47:29,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:47:29,459 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) [2021-10-13 19:47:29,460 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 [2021-10-13 19:47:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:47:30,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-13 19:47:30,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:47:30,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:47:30,774 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 [2021-10-13 19:47:31,009 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 [2021-10-13 19:47:31,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:47:31,090 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 30 treesize of output 29 [2021-10-13 19:47:31,203 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-13 19:47:31,204 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 35 treesize of output 37 [2021-10-13 19:47:31,332 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-13 19:47:31,333 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 34 treesize of output 36 [2021-10-13 19:47:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:32,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571105808] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:32,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:47:32,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 19:47:32,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369754641] [2021-10-13 19:47:32,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 19:47:32,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:47:32,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 19:47:32,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-10-13 19:47:32,494 INFO L87 Difference]: Start difference. First operand 283 states and 795 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) [2021-10-13 19:47:34,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:47:34,192 INFO L93 Difference]: Finished difference Result 307 states and 827 transitions. [2021-10-13 19:47:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 19:47:34,193 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 [2021-10-13 19:47:34,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:47:34,194 INFO L225 Difference]: With dead ends: 307 [2021-10-13 19:47:34,195 INFO L226 Difference]: Without dead ends: 283 [2021-10-13 19:47:34,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2498.4ms TimeCoverageRelationStatistics Valid=185, Invalid=1885, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 19:47:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-10-13 19:47:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 275. [2021-10-13 19:47:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 273 states have (on average 2.838827838827839) internal successors, (775), 274 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:47:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 775 transitions. [2021-10-13 19:47:34,199 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 775 transitions. Word has length 18 [2021-10-13 19:47:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:47:34,200 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 775 transitions. [2021-10-13 19:47:34,200 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) [2021-10-13 19:47:34,200 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 775 transitions. [2021-10-13 19:47:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:47:34,200 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:47:34,200 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:47:34,228 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 [2021-10-13 19:47:34,401 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 [2021-10-13 19:47:34,401 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:47:34,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:47:34,402 INFO L82 PathProgramCache]: Analyzing trace with hash -48218369, now seen corresponding path program 26 times [2021-10-13 19:47:34,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:47:34,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282183987] [2021-10-13 19:47:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:47:34,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:47:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:47:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:34,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:47:34,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282183987] [2021-10-13 19:47:34,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282183987] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:34,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953179024] [2021-10-13 19:47:34,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:47:34,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:47:34,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:47:34,995 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) [2021-10-13 19:47:34,997 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 [2021-10-13 19:47:36,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:47:36,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:47:36,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-13 19:47:36,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:47:36,625 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 [2021-10-13 19:47:36,696 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 [2021-10-13 19:47:36,763 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 [2021-10-13 19:47:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:37,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953179024] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:37,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:47:37,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 19:47:37,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101327049] [2021-10-13 19:47:37,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 19:47:37,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:47:37,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 19:47:37,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-10-13 19:47:37,562 INFO L87 Difference]: Start difference. First operand 275 states and 775 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) [2021-10-13 19:47:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:47:38,276 INFO L93 Difference]: Finished difference Result 285 states and 784 transitions. [2021-10-13 19:47:38,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 19:47:38,277 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 [2021-10-13 19:47:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:47:38,278 INFO L225 Difference]: With dead ends: 285 [2021-10-13 19:47:38,278 INFO L226 Difference]: Without dead ends: 285 [2021-10-13 19:47:38,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1251.8ms TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 19:47:38,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-10-13 19:47:38,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 271. [2021-10-13 19:47:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 269 states have (on average 2.8438661710037176) internal successors, (765), 270 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:47:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 765 transitions. [2021-10-13 19:47:38,283 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 765 transitions. Word has length 18 [2021-10-13 19:47:38,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:47:38,283 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 765 transitions. [2021-10-13 19:47:38,284 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) [2021-10-13 19:47:38,284 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 765 transitions. [2021-10-13 19:47:38,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:47:38,284 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:47:38,285 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:47:38,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-13 19:47:38,500 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 [2021-10-13 19:47:38,501 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:47:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:47:38,501 INFO L82 PathProgramCache]: Analyzing trace with hash -48218368, now seen corresponding path program 20 times [2021-10-13 19:47:38,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:47:38,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303802394] [2021-10-13 19:47:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:47:38,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:47:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:47:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:40,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:47:40,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303802394] [2021-10-13 19:47:40,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303802394] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:40,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946345725] [2021-10-13 19:47:40,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:47:40,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:47:40,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:47:40,202 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) [2021-10-13 19:47:40,203 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 [2021-10-13 19:47:41,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:47:41,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:47:41,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-13 19:47:41,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:47:41,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:47:41,565 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 [2021-10-13 19:47:41,776 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 [2021-10-13 19:47:41,864 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 19:47:41,864 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 [2021-10-13 19:47:41,976 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 19:47:41,976 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 [2021-10-13 19:47:42,083 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 19:47:42,083 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 [2021-10-13 19:47:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:43,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946345725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:43,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:47:43,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-13 19:47:43,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548453757] [2021-10-13 19:47:43,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:47:43,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:47:43,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:47:43,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:47:43,432 INFO L87 Difference]: Start difference. First operand 271 states and 765 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) [2021-10-13 19:47:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:47:46,228 INFO L93 Difference]: Finished difference Result 277 states and 768 transitions. [2021-10-13 19:47:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 19:47:46,229 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 [2021-10-13 19:47:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:47:46,230 INFO L225 Difference]: With dead ends: 277 [2021-10-13 19:47:46,230 INFO L226 Difference]: Without dead ends: 246 [2021-10-13 19:47:46,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 3607.4ms TimeCoverageRelationStatistics Valid=179, Invalid=1983, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 19:47:46,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-10-13 19:47:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2021-10-13 19:47:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 244 states have (on average 2.959016393442623) internal successors, (722), 245 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:47:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 722 transitions. [2021-10-13 19:47:46,236 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 722 transitions. Word has length 18 [2021-10-13 19:47:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:47:46,236 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 722 transitions. [2021-10-13 19:47:46,237 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) [2021-10-13 19:47:46,237 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 722 transitions. [2021-10-13 19:47:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:47:46,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:47:46,238 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:47:46,278 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 [2021-10-13 19:47:46,451 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 [2021-10-13 19:47:46,452 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:47:46,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:47:46,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1101287344, now seen corresponding path program 27 times [2021-10-13 19:47:46,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:47:46,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565123770] [2021-10-13 19:47:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:47:46,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:47:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:47:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:48,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:47:48,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565123770] [2021-10-13 19:47:48,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565123770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:48,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080693322] [2021-10-13 19:47:48,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:47:48,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:47:48,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:47:48,273 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) [2021-10-13 19:47:48,278 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 [2021-10-13 19:47:49,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:47:49,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:47:49,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 19:47:49,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:47:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 19:47:50,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080693322] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:50,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:47:50,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 22 [2021-10-13 19:47:50,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43094507] [2021-10-13 19:47:50,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 19:47:50,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:47:50,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 19:47:50,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2021-10-13 19:47:50,463 INFO L87 Difference]: Start difference. First operand 246 states and 722 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) [2021-10-13 19:47:52,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:47:52,865 INFO L93 Difference]: Finished difference Result 294 states and 821 transitions. [2021-10-13 19:47:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 19:47:52,865 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 [2021-10-13 19:47:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:47:52,867 INFO L225 Difference]: With dead ends: 294 [2021-10-13 19:47:52,867 INFO L226 Difference]: Without dead ends: 294 [2021-10-13 19:47:52,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2912.3ms TimeCoverageRelationStatistics Valid=200, Invalid=1522, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 19:47:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-10-13 19:47:52,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 242. [2021-10-13 19:47:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 240 states have (on average 2.95) internal successors, (708), 241 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:47:52,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 708 transitions. [2021-10-13 19:47:52,871 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 708 transitions. Word has length 19 [2021-10-13 19:47:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:47:52,872 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 708 transitions. [2021-10-13 19:47:52,872 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) [2021-10-13 19:47:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 708 transitions. [2021-10-13 19:47:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:47:52,872 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:47:52,873 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:47:52,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-10-13 19:47:53,074 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 [2021-10-13 19:47:53,075 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:47:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:47:53,075 INFO L82 PathProgramCache]: Analyzing trace with hash 200820737, now seen corresponding path program 28 times [2021-10-13 19:47:53,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:47:53,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520730961] [2021-10-13 19:47:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:47:53,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:47:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:47:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:47:54,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:47:54,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520730961] [2021-10-13 19:47:54,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520730961] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:54,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772717027] [2021-10-13 19:47:54,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:47:54,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:47:54,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:47:54,540 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) [2021-10-13 19:47:54,541 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 [2021-10-13 19:47:56,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:47:56,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:47:56,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 19:47:56,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:47:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 19:47:56,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772717027] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:47:56,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:47:56,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 25 [2021-10-13 19:47:56,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015597850] [2021-10-13 19:47:56,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 19:47:56,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:47:56,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 19:47:56,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-10-13 19:47:56,783 INFO L87 Difference]: Start difference. First operand 242 states and 708 transitions. Second operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:47:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:47:58,360 INFO L93 Difference]: Finished difference Result 294 states and 838 transitions. [2021-10-13 19:47:58,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 19:47:58,360 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 19:47:58,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:47:58,362 INFO L225 Difference]: With dead ends: 294 [2021-10-13 19:47:58,363 INFO L226 Difference]: Without dead ends: 294 [2021-10-13 19:47:58,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1714.7ms TimeCoverageRelationStatistics Valid=130, Invalid=1276, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 19:47:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-10-13 19:47:58,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 250. [2021-10-13 19:47:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 248 states have (on average 2.935483870967742) internal successors, (728), 249 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:47:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 728 transitions. [2021-10-13 19:47:58,368 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 728 transitions. Word has length 19 [2021-10-13 19:47:58,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:47:58,369 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 728 transitions. [2021-10-13 19:47:58,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:47:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 728 transitions. [2021-10-13 19:47:58,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:47:58,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:47:58,370 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:47:58,403 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 [2021-10-13 19:47:58,582 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 [2021-10-13 19:47:58,583 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:47:58,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:47:58,584 INFO L82 PathProgramCache]: Analyzing trace with hash 200820738, now seen corresponding path program 21 times [2021-10-13 19:47:58,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:47:58,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521806824] [2021-10-13 19:47:58,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:47:58,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:47:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:48:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:48:01,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:48:01,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521806824] [2021-10-13 19:48:01,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521806824] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:01,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503945800] [2021-10-13 19:48:01,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:48:01,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:48:01,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:48:01,693 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) [2021-10-13 19:48:01,694 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 [2021-10-13 19:48:03,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:48:03,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:48:03,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 19:48:03,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:48:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 19:48:04,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503945800] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:04,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:48:04,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 24 [2021-10-13 19:48:04,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402741724] [2021-10-13 19:48:04,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 19:48:04,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:48:04,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 19:48:04,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:48:04,056 INFO L87 Difference]: Start difference. First operand 250 states and 728 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) [2021-10-13 19:48:05,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:48:05,939 INFO L93 Difference]: Finished difference Result 306 states and 864 transitions. [2021-10-13 19:48:05,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 19:48:05,939 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 [2021-10-13 19:48:05,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:48:05,941 INFO L225 Difference]: With dead ends: 306 [2021-10-13 19:48:05,941 INFO L226 Difference]: Without dead ends: 306 [2021-10-13 19:48:05,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2204.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 19:48:05,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-10-13 19:48:05,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 246. [2021-10-13 19:48:05,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 244 states have (on average 2.942622950819672) internal successors, (718), 245 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:48:05,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 718 transitions. [2021-10-13 19:48:05,946 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 718 transitions. Word has length 19 [2021-10-13 19:48:05,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:48:05,946 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 718 transitions. [2021-10-13 19:48:05,946 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) [2021-10-13 19:48:05,947 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 718 transitions. [2021-10-13 19:48:05,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:48:05,947 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:48:05,947 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:48:05,977 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 [2021-10-13 19:48:06,147 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 [2021-10-13 19:48:06,148 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:48:06,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:48:06,148 INFO L82 PathProgramCache]: Analyzing trace with hash 158815427, now seen corresponding path program 29 times [2021-10-13 19:48:06,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:48:06,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823136453] [2021-10-13 19:48:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:48:06,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:48:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:48:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:48:06,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:48:06,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823136453] [2021-10-13 19:48:06,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823136453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:06,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965454602] [2021-10-13 19:48:06,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:48:06,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:48:06,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:48:06,951 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) [2021-10-13 19:48:06,954 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 [2021-10-13 19:48:08,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 19:48:08,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:48:08,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 19:48:08,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:48:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:48:09,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965454602] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:09,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:48:09,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 27 [2021-10-13 19:48:09,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419508262] [2021-10-13 19:48:09,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 19:48:09,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:48:09,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 19:48:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2021-10-13 19:48:09,317 INFO L87 Difference]: Start difference. First operand 246 states and 718 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) [2021-10-13 19:48:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:48:10,960 INFO L93 Difference]: Finished difference Result 344 states and 937 transitions. [2021-10-13 19:48:10,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 19:48:10,960 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 [2021-10-13 19:48:10,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:48:10,963 INFO L225 Difference]: With dead ends: 344 [2021-10-13 19:48:10,964 INFO L226 Difference]: Without dead ends: 328 [2021-10-13 19:48:10,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1817.9ms TimeCoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 19:48:10,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-10-13 19:48:10,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 232. [2021-10-13 19:48:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 230 states have (on average 2.865217391304348) internal successors, (659), 231 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:48:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 659 transitions. [2021-10-13 19:48:10,972 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 659 transitions. Word has length 19 [2021-10-13 19:48:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:48:10,972 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 659 transitions. [2021-10-13 19:48:10,972 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) [2021-10-13 19:48:10,972 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 659 transitions. [2021-10-13 19:48:10,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:48:10,973 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:48:10,973 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:48:11,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-10-13 19:48:11,185 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 [2021-10-13 19:48:11,186 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:48:11,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:48:11,186 INFO L82 PathProgramCache]: Analyzing trace with hash 157460418, now seen corresponding path program 22 times [2021-10-13 19:48:11,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:48:11,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388697251] [2021-10-13 19:48:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:48:11,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:48:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:48:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:48:13,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:48:13,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388697251] [2021-10-13 19:48:13,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388697251] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:13,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214682956] [2021-10-13 19:48:13,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:48:13,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:48:13,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:48:13,491 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) [2021-10-13 19:48:13,501 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 [2021-10-13 19:48:14,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:48:14,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:48:14,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 19:48:14,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:48:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:48:15,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214682956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:15,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:48:15,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 28 [2021-10-13 19:48:15,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789217357] [2021-10-13 19:48:15,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:48:15,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:48:15,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:48:15,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:48:15,863 INFO L87 Difference]: Start difference. First operand 232 states and 659 transitions. Second operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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) [2021-10-13 19:48:18,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:48:18,527 INFO L93 Difference]: Finished difference Result 300 states and 815 transitions. [2021-10-13 19:48:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 19:48:18,528 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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 [2021-10-13 19:48:18,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:48:18,530 INFO L225 Difference]: With dead ends: 300 [2021-10-13 19:48:18,530 INFO L226 Difference]: Without dead ends: 300 [2021-10-13 19:48:18,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 3060.9ms TimeCoverageRelationStatistics Valid=231, Invalid=2525, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 19:48:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-10-13 19:48:18,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 232. [2021-10-13 19:48:18,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 230 states have (on average 2.865217391304348) internal successors, (659), 231 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:48:18,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 659 transitions. [2021-10-13 19:48:18,537 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 659 transitions. Word has length 19 [2021-10-13 19:48:18,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:48:18,538 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 659 transitions. [2021-10-13 19:48:18,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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) [2021-10-13 19:48:18,538 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 659 transitions. [2021-10-13 19:48:18,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:48:18,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:48:18,539 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:48:18,572 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 [2021-10-13 19:48:18,750 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 [2021-10-13 19:48:18,751 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:48:18,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:48:18,751 INFO L82 PathProgramCache]: Analyzing trace with hash 157416707, now seen corresponding path program 30 times [2021-10-13 19:48:18,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:48:18,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190874319] [2021-10-13 19:48:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:48:18,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:48:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:48:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:48:21,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:48:21,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190874319] [2021-10-13 19:48:21,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190874319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:21,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082045938] [2021-10-13 19:48:21,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:48:21,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:48:21,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:48:21,105 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) [2021-10-13 19:48:21,106 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 [2021-10-13 19:48:22,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 19:48:22,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:48:22,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 19:48:22,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:48:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:48:23,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082045938] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:23,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:48:23,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 28 [2021-10-13 19:48:23,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055933455] [2021-10-13 19:48:23,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:48:23,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:48:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:48:23,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:48:23,912 INFO L87 Difference]: Start difference. First operand 232 states and 659 transitions. Second operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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) [2021-10-13 19:48:26,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:48:26,847 INFO L93 Difference]: Finished difference Result 292 states and 807 transitions. [2021-10-13 19:48:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 19:48:26,848 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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 [2021-10-13 19:48:26,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:48:26,850 INFO L225 Difference]: With dead ends: 292 [2021-10-13 19:48:26,850 INFO L226 Difference]: Without dead ends: 292 [2021-10-13 19:48:26,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 3606.5ms TimeCoverageRelationStatistics Valid=176, Invalid=2080, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 19:48:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-10-13 19:48:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 236. [2021-10-13 19:48:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 234 states have (on average 2.8675213675213675) internal successors, (671), 235 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:48:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 671 transitions. [2021-10-13 19:48:26,857 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 671 transitions. Word has length 19 [2021-10-13 19:48:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:48:26,857 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 671 transitions. [2021-10-13 19:48:26,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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) [2021-10-13 19:48:26,857 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 671 transitions. [2021-10-13 19:48:26,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:48:26,858 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:48:26,858 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:48:26,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-10-13 19:48:27,060 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 [2021-10-13 19:48:27,061 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:48:27,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:48:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash 157416708, now seen corresponding path program 23 times [2021-10-13 19:48:27,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:48:27,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019296222] [2021-10-13 19:48:27,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:48:27,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:48:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:48:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:48:28,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:48:28,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019296222] [2021-10-13 19:48:28,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019296222] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:28,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972665316] [2021-10-13 19:48:28,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:48:28,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:48:28,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:48:28,920 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) [2021-10-13 19:48:28,921 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 [2021-10-13 19:48:30,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 19:48:30,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:48:30,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 19:48:30,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:48:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:48:31,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972665316] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:31,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:48:31,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-13 19:48:31,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117036538] [2021-10-13 19:48:31,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:48:31,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:48:31,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:48:31,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:48:31,549 INFO L87 Difference]: Start difference. First operand 236 states and 671 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) [2021-10-13 19:48:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:48:35,598 INFO L93 Difference]: Finished difference Result 548 states and 1563 transitions. [2021-10-13 19:48:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 19:48:35,598 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 [2021-10-13 19:48:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:48:35,601 INFO L225 Difference]: With dead ends: 548 [2021-10-13 19:48:35,601 INFO L226 Difference]: Without dead ends: 546 [2021-10-13 19:48:35,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 4113.0ms TimeCoverageRelationStatistics Valid=250, Invalid=2830, Unknown=0, NotChecked=0, Total=3080 [2021-10-13 19:48:35,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-10-13 19:48:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 352. [2021-10-13 19:48:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 350 states have (on average 3.202857142857143) internal successors, (1121), 351 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:48:35,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1121 transitions. [2021-10-13 19:48:35,614 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1121 transitions. Word has length 19 [2021-10-13 19:48:35,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:48:35,615 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 1121 transitions. [2021-10-13 19:48:35,615 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) [2021-10-13 19:48:35,615 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1121 transitions. [2021-10-13 19:48:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:48:35,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:48:35,616 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:48:35,662 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 [2021-10-13 19:48:35,830 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 [2021-10-13 19:48:35,831 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:48:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:48:35,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1143349182, now seen corresponding path program 24 times [2021-10-13 19:48:35,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:48:35,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274570464] [2021-10-13 19:48:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:48:35,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:48:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:48:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:48:37,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:48:37,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274570464] [2021-10-13 19:48:37,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274570464] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:37,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132248261] [2021-10-13 19:48:37,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:48:37,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:48:37,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:48:37,985 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) [2021-10-13 19:48:37,986 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 [2021-10-13 19:48:39,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 19:48:39,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:48:39,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 19:48:39,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:48:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:48:40,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132248261] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:40,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:48:40,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-13 19:48:40,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762361287] [2021-10-13 19:48:40,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:48:40,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:48:40,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:48:40,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=807, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:48:40,787 INFO L87 Difference]: Start difference. First operand 352 states and 1121 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) [2021-10-13 19:48:43,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:48:43,682 INFO L93 Difference]: Finished difference Result 554 states and 1620 transitions. [2021-10-13 19:48:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 19:48:43,683 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 [2021-10-13 19:48:43,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:48:43,686 INFO L225 Difference]: With dead ends: 554 [2021-10-13 19:48:43,686 INFO L226 Difference]: Without dead ends: 514 [2021-10-13 19:48:43,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 3392.2ms TimeCoverageRelationStatistics Valid=188, Invalid=2164, Unknown=0, NotChecked=0, Total=2352 [2021-10-13 19:48:43,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-10-13 19:48:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 380. [2021-10-13 19:48:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 378 states have (on average 3.0343915343915344) internal successors, (1147), 379 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:48:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1147 transitions. [2021-10-13 19:48:43,699 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1147 transitions. Word has length 19 [2021-10-13 19:48:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:48:43,699 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1147 transitions. [2021-10-13 19:48:43,700 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) [2021-10-13 19:48:43,700 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1147 transitions. [2021-10-13 19:48:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:48:43,701 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:48:43,701 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:48:43,749 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 [2021-10-13 19:48:43,915 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 [2021-10-13 19:48:43,916 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:48:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:48:43,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1144747903, now seen corresponding path program 31 times [2021-10-13 19:48:43,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:48:43,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136555452] [2021-10-13 19:48:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:48:43,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:48:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:48:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:48:44,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:48:44,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136555452] [2021-10-13 19:48:44,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136555452] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:44,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985301395] [2021-10-13 19:48:44,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:48:44,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:48:44,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:48:44,695 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) [2021-10-13 19:48:44,698 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 [2021-10-13 19:48:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:48:46,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 19:48:46,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:48:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 19:48:47,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985301395] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:47,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:48:47,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 24 [2021-10-13 19:48:47,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370461077] [2021-10-13 19:48:47,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 19:48:47,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:48:47,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 19:48:47,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:48:47,105 INFO L87 Difference]: Start difference. First operand 380 states and 1147 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) [2021-10-13 19:48:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:48:49,447 INFO L93 Difference]: Finished difference Result 648 states and 1817 transitions. [2021-10-13 19:48:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 19:48:49,447 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 [2021-10-13 19:48:49,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:48:49,450 INFO L225 Difference]: With dead ends: 648 [2021-10-13 19:48:49,450 INFO L226 Difference]: Without dead ends: 640 [2021-10-13 19:48:49,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2134.3ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-10-13 19:48:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-10-13 19:48:49,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 468. [2021-10-13 19:48:49,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 466 states have (on average 3.109442060085837) internal successors, (1449), 467 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:48:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1449 transitions. [2021-10-13 19:48:49,463 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1449 transitions. Word has length 19 [2021-10-13 19:48:49,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:48:49,463 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 1449 transitions. [2021-10-13 19:48:49,463 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) [2021-10-13 19:48:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1449 transitions. [2021-10-13 19:48:49,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:48:49,464 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:48:49,464 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:48:49,494 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 [2021-10-13 19:48:49,664 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 [2021-10-13 19:48:49,665 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:48:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:48:49,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1186708046, now seen corresponding path program 32 times [2021-10-13 19:48:49,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:48:49,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372289292] [2021-10-13 19:48:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:48:49,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:48:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:48:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:48:50,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:48:50,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372289292] [2021-10-13 19:48:50,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372289292] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:50,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669262232] [2021-10-13 19:48:50,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:48:50,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:48:50,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:48:50,351 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) [2021-10-13 19:48:50,352 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 [2021-10-13 19:48:52,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:48:52,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:48:52,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 19:48:52,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:48:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:48:53,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669262232] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:53,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:48:53,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 19:48:53,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842501579] [2021-10-13 19:48:53,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 19:48:53,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:48:53,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 19:48:53,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-10-13 19:48:53,140 INFO L87 Difference]: Start difference. First operand 468 states and 1449 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) [2021-10-13 19:48:54,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:48:54,677 INFO L93 Difference]: Finished difference Result 626 states and 1854 transitions. [2021-10-13 19:48:54,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 19:48:54,678 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 [2021-10-13 19:48:54,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:48:54,680 INFO L225 Difference]: With dead ends: 626 [2021-10-13 19:48:54,680 INFO L226 Difference]: Without dead ends: 626 [2021-10-13 19:48:54,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1775.0ms TimeCoverageRelationStatistics Valid=250, Invalid=1820, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 19:48:54,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-10-13 19:48:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 494. [2021-10-13 19:48:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 492 states have (on average 3.1504065040650406) internal successors, (1550), 493 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:48:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1550 transitions. [2021-10-13 19:48:54,690 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1550 transitions. Word has length 19 [2021-10-13 19:48:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:48:54,690 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1550 transitions. [2021-10-13 19:48:54,690 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) [2021-10-13 19:48:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1550 transitions. [2021-10-13 19:48:54,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:48:54,691 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:48:54,691 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:48:54,720 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 [2021-10-13 19:48:54,891 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 [2021-10-13 19:48:54,891 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:48:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:48:54,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1186753213, now seen corresponding path program 33 times [2021-10-13 19:48:54,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:48:54,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87956217] [2021-10-13 19:48:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:48:54,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:48:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:48:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:48:55,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:48:55,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87956217] [2021-10-13 19:48:55,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87956217] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:55,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849518473] [2021-10-13 19:48:55,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:48:55,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:48:55,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:48:55,599 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) [2021-10-13 19:48:55,600 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 [2021-10-13 19:48:57,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 19:48:57,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:48:57,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-13 19:48:57,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:48:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:48:58,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849518473] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:48:58,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:48:58,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-13 19:48:58,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551895885] [2021-10-13 19:48:58,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:48:58,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:48:58,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:48:58,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:48:58,857 INFO L87 Difference]: Start difference. First operand 494 states and 1550 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) [2021-10-13 19:49:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:49:00,743 INFO L93 Difference]: Finished difference Result 664 states and 1971 transitions. [2021-10-13 19:49:00,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 19:49:00,744 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 [2021-10-13 19:49:00,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:49:00,746 INFO L225 Difference]: With dead ends: 664 [2021-10-13 19:49:00,746 INFO L226 Difference]: Without dead ends: 658 [2021-10-13 19:49:00,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1955.6ms TimeCoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 19:49:00,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-10-13 19:49:00,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 544. [2021-10-13 19:49:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 542 states have (on average 3.1678966789667897) internal successors, (1717), 543 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:49:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1717 transitions. [2021-10-13 19:49:00,756 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1717 transitions. Word has length 19 [2021-10-13 19:49:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:49:00,756 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 1717 transitions. [2021-10-13 19:49:00,756 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) [2021-10-13 19:49:00,757 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1717 transitions. [2021-10-13 19:49:00,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:49:00,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:49:00,757 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:49:00,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-10-13 19:49:00,958 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 [2021-10-13 19:49:00,958 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:49:00,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:49:00,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1439220867, now seen corresponding path program 34 times [2021-10-13 19:49:00,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:49:00,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242490964] [2021-10-13 19:49:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:49:00,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:49:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:49:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:49:01,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:49:01,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242490964] [2021-10-13 19:49:01,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242490964] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:01,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251009674] [2021-10-13 19:49:01,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:49:01,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:49:01,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:49:01,607 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) [2021-10-13 19:49:01,608 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 [2021-10-13 19:49:03,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:49:03,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:49:03,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 19:49:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:49:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:49:04,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251009674] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:04,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:49:04,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 27 [2021-10-13 19:49:04,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908339390] [2021-10-13 19:49:04,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 19:49:04,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:49:04,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 19:49:04,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2021-10-13 19:49:04,173 INFO L87 Difference]: Start difference. First operand 544 states and 1717 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) [2021-10-13 19:49:05,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:49:05,915 INFO L93 Difference]: Finished difference Result 774 states and 2320 transitions. [2021-10-13 19:49:05,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 19:49:05,916 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 [2021-10-13 19:49:05,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:49:05,954 INFO L225 Difference]: With dead ends: 774 [2021-10-13 19:49:05,955 INFO L226 Difference]: Without dead ends: 768 [2021-10-13 19:49:05,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1692.1ms TimeCoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 19:49:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-10-13 19:49:05,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 646. [2021-10-13 19:49:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 644 states have (on average 3.1801242236024843) internal successors, (2048), 645 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:49:05,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 2048 transitions. [2021-10-13 19:49:05,971 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 2048 transitions. Word has length 19 [2021-10-13 19:49:05,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:49:05,972 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 2048 transitions. [2021-10-13 19:49:05,972 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) [2021-10-13 19:49:05,972 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 2048 transitions. [2021-10-13 19:49:05,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:49:05,973 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:49:05,973 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:49:06,023 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 [2021-10-13 19:49:06,188 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 [2021-10-13 19:49:06,188 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:49:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:49:06,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1439220868, now seen corresponding path program 25 times [2021-10-13 19:49:06,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:49:06,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142751690] [2021-10-13 19:49:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:49:06,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:49:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:49:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:49:08,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:49:08,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142751690] [2021-10-13 19:49:08,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142751690] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:08,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381305062] [2021-10-13 19:49:08,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:49:08,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:49:08,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:49:08,756 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) [2021-10-13 19:49:08,757 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 [2021-10-13 19:49:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:49:10,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 19:49:10,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:49:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:49:11,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381305062] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:11,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:49:11,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-13 19:49:11,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116422060] [2021-10-13 19:49:11,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:49:11,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:49:11,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:49:11,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:49:11,436 INFO L87 Difference]: Start difference. First operand 646 states and 2048 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) [2021-10-13 19:49:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:49:13,964 INFO L93 Difference]: Finished difference Result 778 states and 2310 transitions. [2021-10-13 19:49:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 19:49:13,965 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 [2021-10-13 19:49:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:49:13,968 INFO L225 Difference]: With dead ends: 778 [2021-10-13 19:49:13,968 INFO L226 Difference]: Without dead ends: 738 [2021-10-13 19:49:13,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2855.3ms TimeCoverageRelationStatistics Valid=173, Invalid=1989, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 19:49:13,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-10-13 19:49:13,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 602. [2021-10-13 19:49:13,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 600 states have (on average 3.05) internal successors, (1830), 601 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:49:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1830 transitions. [2021-10-13 19:49:13,984 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1830 transitions. Word has length 19 [2021-10-13 19:49:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:49:13,984 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1830 transitions. [2021-10-13 19:49:13,984 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) [2021-10-13 19:49:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1830 transitions. [2021-10-13 19:49:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:49:13,985 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:49:13,985 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:49:14,019 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 [2021-10-13 19:49:14,198 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 [2021-10-13 19:49:14,199 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:49:14,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:49:14,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1395860547, now seen corresponding path program 35 times [2021-10-13 19:49:14,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:49:14,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383670347] [2021-10-13 19:49:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:49:14,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:49:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:49:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:49:15,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:49:15,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383670347] [2021-10-13 19:49:15,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383670347] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:15,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505408971] [2021-10-13 19:49:15,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:49:15,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:49:15,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:49:15,704 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) [2021-10-13 19:49:15,707 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 [2021-10-13 19:49:17,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 19:49:17,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:49:17,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 19:49:17,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:49:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:49:18,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505408971] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:18,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:49:18,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 28 [2021-10-13 19:49:18,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721688216] [2021-10-13 19:49:18,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:49:18,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:49:18,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:49:18,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:49:18,447 INFO L87 Difference]: Start difference. First operand 602 states and 1830 transitions. Second operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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) [2021-10-13 19:49:20,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:49:20,187 INFO L93 Difference]: Finished difference Result 672 states and 2027 transitions. [2021-10-13 19:49:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 19:49:20,187 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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 [2021-10-13 19:49:20,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:49:20,189 INFO L225 Difference]: With dead ends: 672 [2021-10-13 19:49:20,189 INFO L226 Difference]: Without dead ends: 672 [2021-10-13 19:49:20,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2244.7ms TimeCoverageRelationStatistics Valid=179, Invalid=1891, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 19:49:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-10-13 19:49:20,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 614. [2021-10-13 19:49:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 612 states have (on average 3.052287581699346) internal successors, (1868), 613 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:49:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1868 transitions. [2021-10-13 19:49:20,204 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1868 transitions. Word has length 19 [2021-10-13 19:49:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:49:20,204 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1868 transitions. [2021-10-13 19:49:20,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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) [2021-10-13 19:49:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1868 transitions. [2021-10-13 19:49:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:49:20,205 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:49:20,205 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:49:20,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-10-13 19:49:20,410 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 [2021-10-13 19:49:20,410 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:49:20,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:49:20,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1395860548, now seen corresponding path program 26 times [2021-10-13 19:49:20,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:49:20,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323896598] [2021-10-13 19:49:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:49:20,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:49:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:49:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:49:23,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:49:23,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323896598] [2021-10-13 19:49:23,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323896598] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:23,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691191465] [2021-10-13 19:49:23,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:49:23,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:49:23,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:49:23,041 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) [2021-10-13 19:49:23,042 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 [2021-10-13 19:49:24,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:49:24,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:49:24,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-13 19:49:24,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:49:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:49:25,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691191465] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:25,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:49:25,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-13 19:49:25,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005940563] [2021-10-13 19:49:25,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:49:25,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:49:25,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:49:25,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:49:25,713 INFO L87 Difference]: Start difference. First operand 614 states and 1868 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) [2021-10-13 19:49:27,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:49:27,250 INFO L93 Difference]: Finished difference Result 682 states and 2038 transitions. [2021-10-13 19:49:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 19:49:27,250 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 [2021-10-13 19:49:27,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:49:27,252 INFO L225 Difference]: With dead ends: 682 [2021-10-13 19:49:27,252 INFO L226 Difference]: Without dead ends: 674 [2021-10-13 19:49:27,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1995.9ms TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 19:49:27,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-10-13 19:49:27,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 636. [2021-10-13 19:49:27,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 634 states have (on average 3.033123028391167) internal successors, (1923), 635 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:49:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1923 transitions. [2021-10-13 19:49:27,263 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1923 transitions. Word has length 19 [2021-10-13 19:49:27,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:49:27,263 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1923 transitions. [2021-10-13 19:49:27,264 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) [2021-10-13 19:49:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1923 transitions. [2021-10-13 19:49:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:49:27,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:49:27,264 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:49:27,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-10-13 19:49:27,465 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 [2021-10-13 19:49:27,465 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:49:27,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:49:27,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1018568833, now seen corresponding path program 36 times [2021-10-13 19:49:27,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:49:27,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232013804] [2021-10-13 19:49:27,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:49:27,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:49:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:49:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:49:28,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:49:28,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232013804] [2021-10-13 19:49:28,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232013804] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:28,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225787480] [2021-10-13 19:49:28,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:49:28,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:49:28,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:49:28,793 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) [2021-10-13 19:49:28,796 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 [2021-10-13 19:49:31,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 19:49:31,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:49:31,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 19:49:31,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:49:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:49:32,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225787480] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:32,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:49:32,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 30 [2021-10-13 19:49:32,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746523778] [2021-10-13 19:49:32,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 19:49:32,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:49:32,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 19:49:32,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2021-10-13 19:49:32,361 INFO L87 Difference]: Start difference. First operand 636 states and 1923 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) [2021-10-13 19:49:35,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:49:35,146 INFO L93 Difference]: Finished difference Result 740 states and 2180 transitions. [2021-10-13 19:49:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 19:49:35,147 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 [2021-10-13 19:49:35,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:49:35,150 INFO L225 Difference]: With dead ends: 740 [2021-10-13 19:49:35,150 INFO L226 Difference]: Without dead ends: 740 [2021-10-13 19:49:35,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 3169.1ms TimeCoverageRelationStatistics Valid=262, Invalid=2930, Unknown=0, NotChecked=0, Total=3192 [2021-10-13 19:49:35,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-10-13 19:49:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 628. [2021-10-13 19:49:35,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 626 states have (on average 3.036741214057508) internal successors, (1901), 627 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:49:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1901 transitions. [2021-10-13 19:49:35,161 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1901 transitions. Word has length 20 [2021-10-13 19:49:35,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:49:35,162 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1901 transitions. [2021-10-13 19:49:35,162 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) [2021-10-13 19:49:35,162 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1901 transitions. [2021-10-13 19:49:35,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:49:35,163 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:49:35,163 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:49:35,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-10-13 19:49:35,363 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 [2021-10-13 19:49:35,364 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:49:35,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:49:35,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1974190144, now seen corresponding path program 27 times [2021-10-13 19:49:35,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:49:35,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58425603] [2021-10-13 19:49:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:49:35,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:49:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:49:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:49:37,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:49:37,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58425603] [2021-10-13 19:49:37,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58425603] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:37,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941986843] [2021-10-13 19:49:37,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:49:37,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:49:37,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:49:37,122 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) [2021-10-13 19:49:37,123 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 [2021-10-13 19:49:39,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:49:39,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:49:39,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 19:49:39,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:49:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 19:49:39,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941986843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:39,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:49:39,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 24 [2021-10-13 19:49:39,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910768225] [2021-10-13 19:49:39,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 19:49:39,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:49:39,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 19:49:39,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:49:39,907 INFO L87 Difference]: Start difference. First operand 628 states and 1901 transitions. Second operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:49:43,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:49:43,936 INFO L93 Difference]: Finished difference Result 864 states and 2446 transitions. [2021-10-13 19:49:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 19:49:43,937 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-13 19:49:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:49:43,940 INFO L225 Difference]: With dead ends: 864 [2021-10-13 19:49:43,940 INFO L226 Difference]: Without dead ends: 848 [2021-10-13 19:49:43,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3991.3ms TimeCoverageRelationStatistics Valid=278, Invalid=2584, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 19:49:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-10-13 19:49:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 704. [2021-10-13 19:49:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 702 states have (on average 2.962962962962963) internal successors, (2080), 703 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:49:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 2080 transitions. [2021-10-13 19:49:43,956 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 2080 transitions. Word has length 20 [2021-10-13 19:49:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:49:43,956 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 2080 transitions. [2021-10-13 19:49:43,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:49:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 2080 transitions. [2021-10-13 19:49:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:49:43,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:49:43,957 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:49:44,005 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 [2021-10-13 19:49:44,172 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 [2021-10-13 19:49:44,172 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:49:44,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:49:44,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1932230000, now seen corresponding path program 37 times [2021-10-13 19:49:44,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:49:44,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700600147] [2021-10-13 19:49:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:49:44,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:49:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:49:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:49:46,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:49:46,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700600147] [2021-10-13 19:49:46,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700600147] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:46,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795376562] [2021-10-13 19:49:46,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:49:46,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:49:46,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:49:46,825 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) [2021-10-13 19:49:46,826 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 [2021-10-13 19:49:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:49:48,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 19:49:48,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:49:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 19:49:49,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795376562] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:49,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:49:49,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 25 [2021-10-13 19:49:49,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494913221] [2021-10-13 19:49:49,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 19:49:49,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:49:49,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 19:49:49,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-10-13 19:49:49,602 INFO L87 Difference]: Start difference. First operand 704 states and 2080 transitions. Second operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2021-10-13 19:49:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:49:54,119 INFO L93 Difference]: Finished difference Result 848 states and 2462 transitions. [2021-10-13 19:49:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 19:49:54,119 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 20 [2021-10-13 19:49:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:49:54,121 INFO L225 Difference]: With dead ends: 848 [2021-10-13 19:49:54,122 INFO L226 Difference]: Without dead ends: 848 [2021-10-13 19:49:54,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 4756.8ms TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2021-10-13 19:49:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-10-13 19:49:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 708. [2021-10-13 19:49:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 706 states have (on average 2.963172804532578) internal successors, (2092), 707 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:49:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2092 transitions. [2021-10-13 19:49:54,134 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2092 transitions. Word has length 20 [2021-10-13 19:49:54,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:49:54,135 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 2092 transitions. [2021-10-13 19:49:54,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2021-10-13 19:49:54,135 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2092 transitions. [2021-10-13 19:49:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:49:54,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:49:54,136 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:49:54,166 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 [2021-10-13 19:49:54,337 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 [2021-10-13 19:49:54,337 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:49:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:49:54,338 INFO L82 PathProgramCache]: Analyzing trace with hash 261836607, now seen corresponding path program 38 times [2021-10-13 19:49:54,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:49:54,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899483575] [2021-10-13 19:49:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:49:54,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:49:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:49:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:49:56,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:49:56,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899483575] [2021-10-13 19:49:56,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899483575] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:56,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272090447] [2021-10-13 19:49:56,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:49:56,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:49:56,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:49:56,246 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) [2021-10-13 19:49:56,249 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 [2021-10-13 19:49:58,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:49:58,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:49:58,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 19:49:58,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:49:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 19:49:59,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272090447] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:49:59,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:49:59,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 28 [2021-10-13 19:49:59,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255164563] [2021-10-13 19:49:59,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:49:59,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:49:59,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:49:59,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=807, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:49:59,264 INFO L87 Difference]: Start difference. First operand 708 states and 2092 transitions. Second operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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) Received shutdown request... [2021-10-13 19:50:00,079 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 [2021-10-13 19:50:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:50:00,099 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,124 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 19:50:00,135 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 [2021-10-13 19:50:00,308 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 [2021-10-13 19:50:00,309 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (708states) and FLOYD_HOARE automaton (currently 7 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. [2021-10-13 19:50:00,315 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,315 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,315 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,315 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,315 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,315 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,316 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,316 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,316 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,316 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,316 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 19:50:00,316 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 19:50:00,318 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,318 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,318 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,318 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,318 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,318 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,319 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:50:00,336 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 19:50:00,337 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 19:50:00,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:50:00 BasicIcfg [2021-10-13 19:50:00,345 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 19:50:00,345 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.witnessprinter [2021-10-13 19:50:00,346 INFO L168 Benchmark]: Toolchain (without parser) took 344626.99 ms. Allocated memory was 151.0 MB in the beginning and 857.7 MB in the end (delta: 706.7 MB). Free memory was 126.0 MB in the beginning and 205.7 MB in the end (delta: -79.7 MB). Peak memory consumption was 627.7 MB. Max. memory is 8.0 GB. [2021-10-13 19:50:00,357 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory was 122.4 MB in the beginning and 122.3 MB in the end (delta: 80.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 19:50:00,357 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.37 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 115.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-10-13 19:50:00,358 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.93 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 113.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 19:50:00,358 INFO L168 Benchmark]: Boogie Preprocessor took 36.66 ms. Allocated memory is still 151.0 MB. Free memory was 113.2 MB in the beginning and 111.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 19:50:00,358 INFO L168 Benchmark]: RCFGBuilder took 975.13 ms. Allocated memory is still 151.0 MB. Free memory was 111.7 MB in the beginning and 119.3 MB in the end (delta: -7.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. [2021-10-13 19:50:00,362 INFO L168 Benchmark]: TraceAbstraction took 343222.22 ms. Allocated memory was 151.0 MB in the beginning and 857.7 MB in the end (delta: 706.7 MB). Free memory was 118.8 MB in the beginning and 205.7 MB in the end (delta: -87.0 MB). Peak memory consumption was 620.8 MB. Max. memory is 8.0 GB. [2021-10-13 19:50:00,368 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory was 122.4 MB in the beginning and 122.3 MB in the end (delta: 80.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 308.37 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 115.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 67.93 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 113.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.66 ms. Allocated memory is still 151.0 MB. Free memory was 113.2 MB in the beginning and 111.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 975.13 ms. Allocated memory is still 151.0 MB. Free memory was 111.7 MB in the beginning and 119.3 MB in the end (delta: -7.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 343222.22 ms. Allocated memory was 151.0 MB in the beginning and 857.7 MB in the end (delta: 706.7 MB). Free memory was 118.8 MB in the beginning and 205.7 MB in the end (delta: -87.0 MB). Peak memory consumption was 620.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7555.5ms, 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: 20, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 20, negative conditional: 0, negative unconditional: 20, 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 constructing difference of abstraction (708states) and FLOYD_HOARE automaton (currently 7 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (708states) and FLOYD_HOARE automaton (currently 7 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (708states) and FLOYD_HOARE automaton (currently 7 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (708states) and FLOYD_HOARE automaton (currently 7 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (708states) and FLOYD_HOARE automaton (currently 7 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (708states) and FLOYD_HOARE automaton (currently 7 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (708states) and FLOYD_HOARE automaton (currently 7 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (708states) and FLOYD_HOARE automaton (currently 7 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (708states) and FLOYD_HOARE automaton (currently 7 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (708states) and FLOYD_HOARE automaton (currently 7 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - 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 constructing difference of abstraction (708states) and FLOYD_HOARE automaton (currently 7 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - 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 constructing difference of abstraction (708states) and FLOYD_HOARE automaton (currently 7 states, 30 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 35 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 153 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 343033.3ms, OverallIterations: 76, TraceHistogramMax: 6, EmptinessCheckTime: 67.3ms, AutomataDifference: 123036.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7621.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 962 SDtfs, 4671 SDslu, 9953 SDs, 0 SdLazy, 39706 SolverSat, 1797 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 37061.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2960 GetRequests, 367 SyntacticMatches, 2 SemanticMatches, 2590 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19191 ImplicationChecksByTransitivity, 136126.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=873occurred in iteration=51, InterpolantAutomatonStates: 1694, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 731.6ms AutomataMinimizationTime, 75 MinimizatonAttempts, 5293 StatesRemovedByMinimization, 66 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 840.4ms SsaConstructionTime, 8762.2ms SatisfiabilityAnalysisTime, 124977.0ms InterpolantComputationTime, 2298 NumberOfCodeBlocks, 2285 NumberOfCodeBlocksAsserted, 238 NumberOfCheckSat, 2150 ConstructedInterpolants, 65 QuantifiedInterpolants, 78835 SizeOfPredicates, 966 NumberOfNonLiveVariables, 11958 ConjunctsInSsa, 2244 ConjunctsInUnsatCore, 148 InterpolantComputations, 9 PerfectInterpolantSequences, 281/2541 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