/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Overflow-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 14:54:46,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 14:54:46,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 14:54:46,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-07 14:54:46,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 14:54:46,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 14:54:46,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 14:54:46,568 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-10-07 14:54:46,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 14:54:46,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 14:54:46,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 14:54:46,640 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 14:54:46,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 14:54:46,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 14:54:46,645 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 14:54:46,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 14:54:46,646 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 14:54:46,646 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 14:54:46,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 14:54:46,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 14:54:46,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 14:54:46,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-07 14:54:46,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 14:54:46,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-07 14:54:46,649 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-07 14:54:46,649 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 14:54:46,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-07 14:54:46,649 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 14:54:46,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-07 14:54:46,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 14:54:46,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 14:54:46,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 14:54:46,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 14:54:46,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 14:54:46,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 14:54:46,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-07 14:54:46,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-07 14:54:46,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-07 14:54:46,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-07 14:54:46,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 14:54:46,652 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 14:54:47,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 14:54:47,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 14:54:47,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 14:54:47,118 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 14:54:47,118 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 14:54:47,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2021-10-07 14:54:47,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81f4a7967/586020c9a5f841429faab1a16de7dc57/FLAG1bdce920c [2021-10-07 14:54:47,780 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 14:54:47,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2021-10-07 14:54:47,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81f4a7967/586020c9a5f841429faab1a16de7dc57/FLAG1bdce920c [2021-10-07 14:54:48,148 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81f4a7967/586020c9a5f841429faab1a16de7dc57 [2021-10-07 14:54:48,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 14:54:48,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-07 14:54:48,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 14:54:48,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 14:54:48,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 14:54:48,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:54:48" (1/1) ... [2021-10-07 14:54:48,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3917f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:48, skipping insertion in model container [2021-10-07 14:54:48,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:54:48" (1/1) ... [2021-10-07 14:54:48,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 14:54:48,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 14:54:48,380 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c[2591,2604] [2021-10-07 14:54:48,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 14:54:48,392 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 14:54:48,429 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c[2591,2604] [2021-10-07 14:54:48,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 14:54:48,451 INFO L208 MainTranslator]: Completed translation [2021-10-07 14:54:48,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:48 WrapperNode [2021-10-07 14:54:48,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 14:54:48,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 14:54:48,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 14:54:48,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 14:54:48,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:48" (1/1) ... [2021-10-07 14:54:48,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:48" (1/1) ... [2021-10-07 14:54:48,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 14:54:48,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 14:54:48,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 14:54:48,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 14:54:48,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:48" (1/1) ... [2021-10-07 14:54:48,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:48" (1/1) ... [2021-10-07 14:54:48,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:48" (1/1) ... [2021-10-07 14:54:48,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:48" (1/1) ... [2021-10-07 14:54:48,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:48" (1/1) ... [2021-10-07 14:54:48,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:48" (1/1) ... [2021-10-07 14:54:48,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:48" (1/1) ... [2021-10-07 14:54:48,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 14:54:48,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 14:54:48,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 14:54:48,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 14:54:48,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:48" (1/1) ... [2021-10-07 14:54:48,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 14:54:48,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:54:48,627 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-07 14:54:48,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-07 14:54:48,700 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 14:54:48,701 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 14:54:48,701 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 14:54:48,701 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 14:54:48,702 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 14:54:48,702 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 14:54:48,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-07 14:54:48,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 14:54:48,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-07 14:54:48,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-07 14:54:48,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-07 14:54:48,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 14:54:48,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 14:54:48,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-07 14:54:48,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 14:54:48,708 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 14:54:49,250 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 14:54:49,253 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-07 14:54:49,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:54:49 BoogieIcfgContainer [2021-10-07 14:54:49,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 14:54:49,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 14:54:49,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 14:54:49,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 14:54:49,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 02:54:48" (1/3) ... [2021-10-07 14:54:49,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157b6e55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:54:49, skipping insertion in model container [2021-10-07 14:54:49,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:48" (2/3) ... [2021-10-07 14:54:49,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157b6e55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:54:49, skipping insertion in model container [2021-10-07 14:54:49,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:54:49" (3/3) ... [2021-10-07 14:54:49,274 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2021-10-07 14:54:49,280 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-07 14:54:49,281 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 14:54:49,281 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-10-07 14:54:49,281 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 14:54:49,319 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,319 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,320 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,320 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,321 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,321 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,321 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,322 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,322 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,322 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,322 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,323 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,323 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,323 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,324 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,324 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,324 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,325 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,325 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,325 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,325 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,326 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,326 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,326 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,327 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,328 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,328 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,328 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,329 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,330 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,330 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,330 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,330 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,331 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,331 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,331 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,332 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,332 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,333 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,333 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,334 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,334 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,335 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,335 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,335 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,335 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,336 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,336 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,340 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,340 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,340 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,343 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,343 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,344 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,344 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,344 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,346 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,346 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,347 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:49,356 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-07 14:54:49,425 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 14:54:49,434 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-07 14:54:49,434 INFO L340 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2021-10-07 14:54:49,455 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 14:54:49,470 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 142 transitions, 308 flow [2021-10-07 14:54:49,473 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 142 transitions, 308 flow [2021-10-07 14:54:49,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 136 places, 142 transitions, 308 flow [2021-10-07 14:54:49,576 INFO L129 PetriNetUnfolder]: 16/139 cut-off events. [2021-10-07 14:54:49,576 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-07 14:54:49,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 16/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 242 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2021-10-07 14:54:49,592 INFO L116 LiptonReduction]: Number of co-enabled transitions 5030 [2021-10-07 14:54:55,609 INFO L131 LiptonReduction]: Checked pairs total: 9636 [2021-10-07 14:54:55,609 INFO L133 LiptonReduction]: Total number of compositions: 127 [2021-10-07 14:54:55,620 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 44 transitions, 112 flow [2021-10-07 14:54:55,737 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1548 states, 1424 states have (on average 3.8644662921348316) internal successors, (5503), 1547 states have internal predecessors, (5503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:55,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 1548 states, 1424 states have (on average 3.8644662921348316) internal successors, (5503), 1547 states have internal predecessors, (5503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:55,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 14:54:55,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:55,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 14:54:55,754 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:54:55,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:55,761 INFO L82 PathProgramCache]: Analyzing trace with hash 592693, now seen corresponding path program 1 times [2021-10-07 14:54:55,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:55,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234136494] [2021-10-07 14:54:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:55,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:54:55,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:55,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234136494] [2021-10-07 14:54:55,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234136494] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:55,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:55,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-07 14:54:55,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328369719] [2021-10-07 14:54:55,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 14:54:55,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:55,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 14:54:55,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:54:56,007 INFO L87 Difference]: Start difference. First operand has 1548 states, 1424 states have (on average 3.8644662921348316) internal successors, (5503), 1547 states have internal predecessors, (5503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:56,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:56,212 INFO L93 Difference]: Finished difference Result 1798 states and 6388 transitions. [2021-10-07 14:54:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 14:54:56,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 14:54:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:56,270 INFO L225 Difference]: With dead ends: 1798 [2021-10-07 14:54:56,270 INFO L226 Difference]: Without dead ends: 1798 [2021-10-07 14:54:56,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:54:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-10-07 14:54:56,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1762. [2021-10-07 14:54:56,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1638 states have (on average 3.851037851037851) internal successors, (6308), 1761 states have internal predecessors, (6308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6308 transitions. [2021-10-07 14:54:56,450 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6308 transitions. Word has length 3 [2021-10-07 14:54:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:56,451 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 6308 transitions. [2021-10-07 14:54:56,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:56,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6308 transitions. [2021-10-07 14:54:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 14:54:56,452 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:56,452 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 14:54:56,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-07 14:54:56,453 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:54:56,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:56,454 INFO L82 PathProgramCache]: Analyzing trace with hash 18375068, now seen corresponding path program 1 times [2021-10-07 14:54:56,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:56,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102114230] [2021-10-07 14:54:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:56,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:54:56,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:56,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102114230] [2021-10-07 14:54:56,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102114230] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:54:56,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442636308] [2021-10-07 14:54:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:56,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:54:56,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:54:56,570 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:54:56,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-07 14:54:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:56,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 14:54:56,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:54:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:54:57,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442636308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:54:57,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:54:57,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-07 14:54:57,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462493025] [2021-10-07 14:54:57,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 14:54:57,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:57,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 14:54:57,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-07 14:54:57,080 INFO L87 Difference]: Start difference. First operand 1762 states and 6308 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:57,516 INFO L93 Difference]: Finished difference Result 5052 states and 17073 transitions. [2021-10-07 14:54:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 14:54:57,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 14:54:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:57,576 INFO L225 Difference]: With dead ends: 5052 [2021-10-07 14:54:57,576 INFO L226 Difference]: Without dead ends: 5052 [2021-10-07 14:54:57,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-07 14:54:57,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2021-10-07 14:54:57,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 3060. [2021-10-07 14:54:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 2936 states have (on average 4.202656675749319) internal successors, (12339), 3059 states have internal predecessors, (12339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 12339 transitions. [2021-10-07 14:54:57,778 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 12339 transitions. Word has length 4 [2021-10-07 14:54:57,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:57,779 INFO L470 AbstractCegarLoop]: Abstraction has 3060 states and 12339 transitions. [2021-10-07 14:54:57,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 12339 transitions. [2021-10-07 14:54:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 14:54:57,780 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:57,780 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 14:54:57,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-07 14:54:57,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:54:57,996 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:54:57,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:57,998 INFO L82 PathProgramCache]: Analyzing trace with hash 18375070, now seen corresponding path program 1 times [2021-10-07 14:54:57,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:57,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464904317] [2021-10-07 14:54:57,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:58,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:54:58,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:58,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464904317] [2021-10-07 14:54:58,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464904317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:54:58,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078335545] [2021-10-07 14:54:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:58,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:54:58,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:54:58,087 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:54:58,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-07 14:54:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:58,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 14:54:58,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:54:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:54:58,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078335545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:54:58,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:54:58,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-07 14:54:58,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932092509] [2021-10-07 14:54:58,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 14:54:58,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:58,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 14:54:58,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-07 14:54:58,311 INFO L87 Difference]: Start difference. First operand 3060 states and 12339 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:58,707 INFO L93 Difference]: Finished difference Result 5570 states and 21636 transitions. [2021-10-07 14:54:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 14:54:58,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 14:54:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:58,787 INFO L225 Difference]: With dead ends: 5570 [2021-10-07 14:54:58,787 INFO L226 Difference]: Without dead ends: 5570 [2021-10-07 14:54:58,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-07 14:54:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2021-10-07 14:54:58,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 3978. [2021-10-07 14:54:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3854 states have (on average 4.459782044628957) internal successors, (17188), 3977 states have internal predecessors, (17188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 17188 transitions. [2021-10-07 14:54:59,041 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 17188 transitions. Word has length 4 [2021-10-07 14:54:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:59,042 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 17188 transitions. [2021-10-07 14:54:59,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:59,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 17188 transitions. [2021-10-07 14:54:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 14:54:59,043 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:59,043 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-07 14:54:59,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-07 14:54:59,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:54:59,257 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:54:59,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:59,258 INFO L82 PathProgramCache]: Analyzing trace with hash 569628678, now seen corresponding path program 1 times [2021-10-07 14:54:59,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:59,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587716492] [2021-10-07 14:54:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:59,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 14:54:59,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:59,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587716492] [2021-10-07 14:54:59,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587716492] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:59,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:59,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-07 14:54:59,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422570536] [2021-10-07 14:54:59,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 14:54:59,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:59,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 14:54:59,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:54:59,377 INFO L87 Difference]: Start difference. First operand 3978 states and 17188 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:59,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:59,512 INFO L93 Difference]: Finished difference Result 5936 states and 24801 transitions. [2021-10-07 14:54:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 14:54:59,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 14:54:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:59,619 INFO L225 Difference]: With dead ends: 5936 [2021-10-07 14:54:59,620 INFO L226 Difference]: Without dead ends: 5936 [2021-10-07 14:54:59,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:54:59,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-10-07 14:54:59,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 5210. [2021-10-07 14:54:59,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5210 states, 5086 states have (on average 4.579630357845065) internal successors, (23292), 5209 states have internal predecessors, (23292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5210 states to 5210 states and 23292 transitions. [2021-10-07 14:55:00,070 INFO L78 Accepts]: Start accepts. Automaton has 5210 states and 23292 transitions. Word has length 5 [2021-10-07 14:55:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:00,070 INFO L470 AbstractCegarLoop]: Abstraction has 5210 states and 23292 transitions. [2021-10-07 14:55:00,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 5210 states and 23292 transitions. [2021-10-07 14:55:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 14:55:00,072 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:00,072 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-07 14:55:00,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-07 14:55:00,073 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:00,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:00,074 INFO L82 PathProgramCache]: Analyzing trace with hash 569628679, now seen corresponding path program 1 times [2021-10-07 14:55:00,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:00,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795566941] [2021-10-07 14:55:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:00,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:00,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:00,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795566941] [2021-10-07 14:55:00,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795566941] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:00,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267971181] [2021-10-07 14:55:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:00,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:00,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:00,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:55:00,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-07 14:55:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:00,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-07 14:55:00,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:00,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267971181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:00,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:55:00,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-07 14:55:00,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720777529] [2021-10-07 14:55:00,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 14:55:00,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:00,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 14:55:00,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-07 14:55:00,836 INFO L87 Difference]: Start difference. First operand 5210 states and 23292 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:01,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:01,401 INFO L93 Difference]: Finished difference Result 10108 states and 38674 transitions. [2021-10-07 14:55:01,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-07 14:55:01,403 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 14:55:01,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:01,482 INFO L225 Difference]: With dead ends: 10108 [2021-10-07 14:55:01,482 INFO L226 Difference]: Without dead ends: 10108 [2021-10-07 14:55:01,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-10-07 14:55:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10108 states. [2021-10-07 14:55:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10108 to 6526. [2021-10-07 14:55:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6526 states, 6402 states have (on average 4.260699781318338) internal successors, (27277), 6525 states have internal predecessors, (27277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6526 states to 6526 states and 27277 transitions. [2021-10-07 14:55:02,146 INFO L78 Accepts]: Start accepts. Automaton has 6526 states and 27277 transitions. Word has length 5 [2021-10-07 14:55:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:02,146 INFO L470 AbstractCegarLoop]: Abstraction has 6526 states and 27277 transitions. [2021-10-07 14:55:02,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 6526 states and 27277 transitions. [2021-10-07 14:55:02,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 14:55:02,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:02,148 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2021-10-07 14:55:02,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-07 14:55:02,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:02,364 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:02,364 INFO L82 PathProgramCache]: Analyzing trace with hash 478621886, now seen corresponding path program 2 times [2021-10-07 14:55:02,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:02,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023482069] [2021-10-07 14:55:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:02,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 14:55:02,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:02,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023482069] [2021-10-07 14:55:02,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023482069] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:02,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563598296] [2021-10-07 14:55:02,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 14:55:02,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:02,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:02,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:55:02,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-07 14:55:02,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 14:55:02,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:55:02,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 14:55:02,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:02,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563598296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:02,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:55:02,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2021-10-07 14:55:02,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028769474] [2021-10-07 14:55:02,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-07 14:55:02,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:02,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-07 14:55:02,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-07 14:55:02,972 INFO L87 Difference]: Start difference. First operand 6526 states and 27277 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:03,554 INFO L93 Difference]: Finished difference Result 14284 states and 53230 transitions. [2021-10-07 14:55:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 14:55:03,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 14:55:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:03,652 INFO L225 Difference]: With dead ends: 14284 [2021-10-07 14:55:03,652 INFO L226 Difference]: Without dead ends: 14268 [2021-10-07 14:55:03,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-07 14:55:03,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14268 states. [2021-10-07 14:55:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14268 to 7934. [2021-10-07 14:55:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7810 states have (on average 4.276696542893726) internal successors, (33401), 7933 states have internal predecessors, (33401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:04,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 33401 transitions. [2021-10-07 14:55:04,380 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 33401 transitions. Word has length 6 [2021-10-07 14:55:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:04,383 INFO L470 AbstractCegarLoop]: Abstraction has 7934 states and 33401 transitions. [2021-10-07 14:55:04,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 33401 transitions. [2021-10-07 14:55:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 14:55:04,385 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:04,385 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:04,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-07 14:55:04,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:04,590 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:04,591 INFO L82 PathProgramCache]: Analyzing trace with hash -121263379, now seen corresponding path program 1 times [2021-10-07 14:55:04,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:04,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562903973] [2021-10-07 14:55:04,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:04,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 14:55:04,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:04,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562903973] [2021-10-07 14:55:04,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562903973] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:55:04,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:55:04,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-07 14:55:04,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480648241] [2021-10-07 14:55:04,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 14:55:04,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:04,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 14:55:04,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:55:04,650 INFO L87 Difference]: Start difference. First operand 7934 states and 33401 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:04,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:04,788 INFO L93 Difference]: Finished difference Result 10434 states and 42785 transitions. [2021-10-07 14:55:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 14:55:04,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 14:55:04,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:04,876 INFO L225 Difference]: With dead ends: 10434 [2021-10-07 14:55:04,876 INFO L226 Difference]: Without dead ends: 10434 [2021-10-07 14:55:04,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:55:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10434 states. [2021-10-07 14:55:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10434 to 7912. [2021-10-07 14:55:05,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7912 states, 7788 states have (on average 4.317668207498716) internal successors, (33626), 7911 states have internal predecessors, (33626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7912 states to 7912 states and 33626 transitions. [2021-10-07 14:55:05,469 INFO L78 Accepts]: Start accepts. Automaton has 7912 states and 33626 transitions. Word has length 8 [2021-10-07 14:55:05,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:05,470 INFO L470 AbstractCegarLoop]: Abstraction has 7912 states and 33626 transitions. [2021-10-07 14:55:05,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 7912 states and 33626 transitions. [2021-10-07 14:55:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 14:55:05,472 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:05,472 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:05,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-07 14:55:05,473 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:05,473 INFO L82 PathProgramCache]: Analyzing trace with hash -236535499, now seen corresponding path program 1 times [2021-10-07 14:55:05,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:05,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093579652] [2021-10-07 14:55:05,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:05,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:05,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:05,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093579652] [2021-10-07 14:55:05,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093579652] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:05,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729372205] [2021-10-07 14:55:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:05,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:05,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:05,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:55:05,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-07 14:55:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:05,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-07 14:55:05,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:05,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729372205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:05,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:55:05,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2021-10-07 14:55:05,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084147757] [2021-10-07 14:55:05,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 14:55:05,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:05,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 14:55:05,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 14:55:05,616 INFO L87 Difference]: Start difference. First operand 7912 states and 33626 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:05,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:05,833 INFO L93 Difference]: Finished difference Result 13154 states and 53132 transitions. [2021-10-07 14:55:05,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 14:55:05,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 14:55:05,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:06,039 INFO L225 Difference]: With dead ends: 13154 [2021-10-07 14:55:06,039 INFO L226 Difference]: Without dead ends: 13154 [2021-10-07 14:55:06,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 14:55:06,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13154 states. [2021-10-07 14:55:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13154 to 9674. [2021-10-07 14:55:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9674 states, 9550 states have (on average 4.425968586387435) internal successors, (42268), 9673 states have internal predecessors, (42268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9674 states to 9674 states and 42268 transitions. [2021-10-07 14:55:06,652 INFO L78 Accepts]: Start accepts. Automaton has 9674 states and 42268 transitions. Word has length 8 [2021-10-07 14:55:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:06,653 INFO L470 AbstractCegarLoop]: Abstraction has 9674 states and 42268 transitions. [2021-10-07 14:55:06,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:06,653 INFO L276 IsEmpty]: Start isEmpty. Operand 9674 states and 42268 transitions. [2021-10-07 14:55:06,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 14:55:06,655 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:06,655 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:06,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-07 14:55:06,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:06,869 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash 424109002, now seen corresponding path program 1 times [2021-10-07 14:55:06,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:06,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054682924] [2021-10-07 14:55:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:06,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:06,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:06,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054682924] [2021-10-07 14:55:06,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054682924] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:06,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187482324] [2021-10-07 14:55:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:06,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:06,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:06,916 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:55:06,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-07 14:55:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:07,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 14:55:07,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:07,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187482324] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:07,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:55:07,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2021-10-07 14:55:07,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440031212] [2021-10-07 14:55:07,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-07 14:55:07,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:07,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-07 14:55:07,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-10-07 14:55:07,182 INFO L87 Difference]: Start difference. First operand 9674 states and 42268 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:07,902 INFO L93 Difference]: Finished difference Result 17064 states and 70852 transitions. [2021-10-07 14:55:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-07 14:55:07,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 14:55:07,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:07,998 INFO L225 Difference]: With dead ends: 17064 [2021-10-07 14:55:07,999 INFO L226 Difference]: Without dead ends: 17062 [2021-10-07 14:55:07,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2021-10-07 14:55:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17062 states. [2021-10-07 14:55:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17062 to 12038. [2021-10-07 14:55:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12038 states, 11914 states have (on average 4.404314252140339) internal successors, (52473), 12037 states have internal predecessors, (52473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12038 states to 12038 states and 52473 transitions. [2021-10-07 14:55:08,959 INFO L78 Accepts]: Start accepts. Automaton has 12038 states and 52473 transitions. Word has length 9 [2021-10-07 14:55:08,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:08,960 INFO L470 AbstractCegarLoop]: Abstraction has 12038 states and 52473 transitions. [2021-10-07 14:55:08,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:08,960 INFO L276 IsEmpty]: Start isEmpty. Operand 12038 states and 52473 transitions. [2021-10-07 14:55:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 14:55:08,962 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:08,962 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:09,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-07 14:55:09,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:09,178 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:09,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:09,179 INFO L82 PathProgramCache]: Analyzing trace with hash -569698805, now seen corresponding path program 1 times [2021-10-07 14:55:09,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:09,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797334815] [2021-10-07 14:55:09,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:09,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 14:55:09,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:09,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797334815] [2021-10-07 14:55:09,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797334815] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:55:09,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:55:09,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-07 14:55:09,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758067913] [2021-10-07 14:55:09,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 14:55:09,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:09,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 14:55:09,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:55:09,215 INFO L87 Difference]: Start difference. First operand 12038 states and 52473 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:09,387 INFO L93 Difference]: Finished difference Result 15598 states and 66036 transitions. [2021-10-07 14:55:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 14:55:09,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 14:55:09,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:09,464 INFO L225 Difference]: With dead ends: 15598 [2021-10-07 14:55:09,464 INFO L226 Difference]: Without dead ends: 15598 [2021-10-07 14:55:09,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:55:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15598 states. [2021-10-07 14:55:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15598 to 12036. [2021-10-07 14:55:10,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12036 states, 11912 states have (on average 4.41714237743452) internal successors, (52617), 12035 states have internal predecessors, (52617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12036 states to 12036 states and 52617 transitions. [2021-10-07 14:55:10,320 INFO L78 Accepts]: Start accepts. Automaton has 12036 states and 52617 transitions. Word has length 10 [2021-10-07 14:55:10,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:10,321 INFO L470 AbstractCegarLoop]: Abstraction has 12036 states and 52617 transitions. [2021-10-07 14:55:10,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:10,321 INFO L276 IsEmpty]: Start isEmpty. Operand 12036 states and 52617 transitions. [2021-10-07 14:55:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 14:55:10,324 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:10,324 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:10,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-07 14:55:10,325 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash 262478411, now seen corresponding path program 1 times [2021-10-07 14:55:10,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:10,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138892935] [2021-10-07 14:55:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:10,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:10,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:10,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138892935] [2021-10-07 14:55:10,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138892935] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:55:10,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:55:10,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-07 14:55:10,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973276523] [2021-10-07 14:55:10,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 14:55:10,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:10,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 14:55:10,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 14:55:10,390 INFO L87 Difference]: Start difference. First operand 12036 states and 52617 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:10,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:10,816 INFO L93 Difference]: Finished difference Result 20432 states and 83619 transitions. [2021-10-07 14:55:10,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 14:55:10,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 14:55:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:10,923 INFO L225 Difference]: With dead ends: 20432 [2021-10-07 14:55:10,923 INFO L226 Difference]: Without dead ends: 20432 [2021-10-07 14:55:10,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 14:55:10,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20432 states. [2021-10-07 14:55:11,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20432 to 16314. [2021-10-07 14:55:11,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16314 states, 16190 states have (on average 4.392958616429895) internal successors, (71122), 16313 states have internal predecessors, (71122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16314 states to 16314 states and 71122 transitions. [2021-10-07 14:55:11,840 INFO L78 Accepts]: Start accepts. Automaton has 16314 states and 71122 transitions. Word has length 10 [2021-10-07 14:55:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:11,841 INFO L470 AbstractCegarLoop]: Abstraction has 16314 states and 71122 transitions. [2021-10-07 14:55:11,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 16314 states and 71122 transitions. [2021-10-07 14:55:11,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 14:55:11,843 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:11,843 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:11,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-07 14:55:11,843 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:11,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:11,844 INFO L82 PathProgramCache]: Analyzing trace with hash 322723989, now seen corresponding path program 2 times [2021-10-07 14:55:11,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:11,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897851122] [2021-10-07 14:55:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:11,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:11,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:11,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897851122] [2021-10-07 14:55:11,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897851122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:11,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594005400] [2021-10-07 14:55:11,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 14:55:11,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:11,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:11,966 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:55:11,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-07 14:55:12,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 14:55:12,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:55:12,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 14:55:12,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:12,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594005400] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:12,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:55:12,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2021-10-07 14:55:12,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134619845] [2021-10-07 14:55:12,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 14:55:12,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:12,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 14:55:12,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-07 14:55:12,551 INFO L87 Difference]: Start difference. First operand 16314 states and 71122 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:13,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:13,589 INFO L93 Difference]: Finished difference Result 34370 states and 141660 transitions. [2021-10-07 14:55:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 14:55:13,591 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 14:55:13,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:13,807 INFO L225 Difference]: With dead ends: 34370 [2021-10-07 14:55:13,807 INFO L226 Difference]: Without dead ends: 34370 [2021-10-07 14:55:13,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-10-07 14:55:13,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34370 states. [2021-10-07 14:55:14,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34370 to 19950. [2021-10-07 14:55:14,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19950 states, 19826 states have (on average 4.509280742459397) internal successors, (89401), 19949 states have internal predecessors, (89401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19950 states to 19950 states and 89401 transitions. [2021-10-07 14:55:14,929 INFO L78 Accepts]: Start accepts. Automaton has 19950 states and 89401 transitions. Word has length 10 [2021-10-07 14:55:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:14,930 INFO L470 AbstractCegarLoop]: Abstraction has 19950 states and 89401 transitions. [2021-10-07 14:55:14,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 19950 states and 89401 transitions. [2021-10-07 14:55:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 14:55:14,932 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:14,935 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:15,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-07 14:55:15,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:15,136 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1346542294, now seen corresponding path program 3 times [2021-10-07 14:55:15,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:15,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395362908] [2021-10-07 14:55:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:15,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:15,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:15,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395362908] [2021-10-07 14:55:15,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395362908] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:15,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973912152] [2021-10-07 14:55:15,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 14:55:15,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:15,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:15,230 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:55:15,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-07 14:55:15,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 14:55:15,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:55:15,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-07 14:55:15,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:16,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973912152] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:16,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:55:16,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-07 14:55:16,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178007916] [2021-10-07 14:55:16,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 14:55:16,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:16,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 14:55:16,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-07 14:55:16,115 INFO L87 Difference]: Start difference. First operand 19950 states and 89401 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:17,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:17,271 INFO L93 Difference]: Finished difference Result 40126 states and 174241 transitions. [2021-10-07 14:55:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 14:55:17,271 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 14:55:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:17,497 INFO L225 Difference]: With dead ends: 40126 [2021-10-07 14:55:17,497 INFO L226 Difference]: Without dead ends: 40126 [2021-10-07 14:55:17,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-10-07 14:55:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40126 states. [2021-10-07 14:55:18,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40126 to 27674. [2021-10-07 14:55:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27674 states, 27550 states have (on average 4.623557168784029) internal successors, (127379), 27673 states have internal predecessors, (127379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27674 states to 27674 states and 127379 transitions. [2021-10-07 14:55:18,859 INFO L78 Accepts]: Start accepts. Automaton has 27674 states and 127379 transitions. Word has length 11 [2021-10-07 14:55:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:18,859 INFO L470 AbstractCegarLoop]: Abstraction has 27674 states and 127379 transitions. [2021-10-07 14:55:18,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 27674 states and 127379 transitions. [2021-10-07 14:55:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 14:55:18,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:18,861 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:18,888 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 [2021-10-07 14:55:19,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-07 14:55:19,072 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:19,073 INFO L82 PathProgramCache]: Analyzing trace with hash -453070358, now seen corresponding path program 4 times [2021-10-07 14:55:19,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:19,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972964622] [2021-10-07 14:55:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:19,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:19,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:19,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972964622] [2021-10-07 14:55:19,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972964622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:19,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778743666] [2021-10-07 14:55:19,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 14:55:19,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:19,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:19,214 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:55:19,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-07 14:55:19,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 14:55:19,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:55:19,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 14:55:19,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:20,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778743666] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:20,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:55:20,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-07 14:55:20,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061360911] [2021-10-07 14:55:20,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 14:55:20,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:20,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 14:55:20,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-07 14:55:20,268 INFO L87 Difference]: Start difference. First operand 27674 states and 127379 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:22,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:22,193 INFO L93 Difference]: Finished difference Result 50334 states and 217332 transitions. [2021-10-07 14:55:22,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 14:55:22,193 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 14:55:22,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:22,552 INFO L225 Difference]: With dead ends: 50334 [2021-10-07 14:55:22,552 INFO L226 Difference]: Without dead ends: 50330 [2021-10-07 14:55:22,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-10-07 14:55:22,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50330 states. [2021-10-07 14:55:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50330 to 36126. [2021-10-07 14:55:24,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36126 states, 36002 states have (on average 4.6749625020832175) internal successors, (168308), 36125 states have internal predecessors, (168308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36126 states to 36126 states and 168308 transitions. [2021-10-07 14:55:24,377 INFO L78 Accepts]: Start accepts. Automaton has 36126 states and 168308 transitions. Word has length 11 [2021-10-07 14:55:24,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:24,377 INFO L470 AbstractCegarLoop]: Abstraction has 36126 states and 168308 transitions. [2021-10-07 14:55:24,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:24,377 INFO L276 IsEmpty]: Start isEmpty. Operand 36126 states and 168308 transitions. [2021-10-07 14:55:24,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 14:55:24,379 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:24,379 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:24,405 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 [2021-10-07 14:55:24,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:24,586 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:24,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:24,587 INFO L82 PathProgramCache]: Analyzing trace with hash -453071366, now seen corresponding path program 2 times [2021-10-07 14:55:24,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:24,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536809413] [2021-10-07 14:55:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:24,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:24,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:24,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536809413] [2021-10-07 14:55:24,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536809413] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:24,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214070477] [2021-10-07 14:55:24,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 14:55:24,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:24,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:55:24,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-07 14:55:24,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 14:55:24,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:55:24,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-07 14:55:24,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:25,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214070477] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:25,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:55:25,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 10 [2021-10-07 14:55:25,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173447900] [2021-10-07 14:55:25,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 14:55:25,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:25,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 14:55:25,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-07 14:55:25,218 INFO L87 Difference]: Start difference. First operand 36126 states and 168308 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:27,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:27,032 INFO L93 Difference]: Finished difference Result 49110 states and 218535 transitions. [2021-10-07 14:55:27,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 14:55:27,033 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 14:55:27,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:27,722 INFO L225 Difference]: With dead ends: 49110 [2021-10-07 14:55:27,722 INFO L226 Difference]: Without dead ends: 49102 [2021-10-07 14:55:27,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-10-07 14:55:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49102 states. [2021-10-07 14:55:28,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49102 to 40836. [2021-10-07 14:55:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40836 states, 40712 states have (on average 4.641923757123207) internal successors, (188982), 40835 states have internal predecessors, (188982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40836 states to 40836 states and 188982 transitions. [2021-10-07 14:55:29,620 INFO L78 Accepts]: Start accepts. Automaton has 40836 states and 188982 transitions. Word has length 11 [2021-10-07 14:55:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:29,620 INFO L470 AbstractCegarLoop]: Abstraction has 40836 states and 188982 transitions. [2021-10-07 14:55:29,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 40836 states and 188982 transitions. [2021-10-07 14:55:29,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 14:55:29,624 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:29,624 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:29,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-07 14:55:29,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-07 14:55:29,830 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:29,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:29,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1933370579, now seen corresponding path program 5 times [2021-10-07 14:55:29,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:29,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382194729] [2021-10-07 14:55:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:29,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:29,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:29,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382194729] [2021-10-07 14:55:29,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382194729] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:29,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816812664] [2021-10-07 14:55:29,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 14:55:29,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:29,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:29,986 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:55:30,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-07 14:55:30,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 14:55:30,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:55:30,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 14:55:30,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:30,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816812664] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:30,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:55:30,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2021-10-07 14:55:30,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726248870] [2021-10-07 14:55:30,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-07 14:55:30,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:30,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-07 14:55:30,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-07 14:55:30,934 INFO L87 Difference]: Start difference. First operand 40836 states and 188982 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:33,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:33,576 INFO L93 Difference]: Finished difference Result 75042 states and 331059 transitions. [2021-10-07 14:55:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 14:55:33,579 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 14:55:33,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:34,115 INFO L225 Difference]: With dead ends: 75042 [2021-10-07 14:55:34,115 INFO L226 Difference]: Without dead ends: 75024 [2021-10-07 14:55:34,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 377.0ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-10-07 14:55:34,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75024 states. [2021-10-07 14:55:36,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75024 to 47100. [2021-10-07 14:55:36,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47100 states, 46976 states have (on average 4.732565565395095) internal successors, (222317), 47099 states have internal predecessors, (222317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:36,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47100 states to 47100 states and 222317 transitions. [2021-10-07 14:55:36,899 INFO L78 Accepts]: Start accepts. Automaton has 47100 states and 222317 transitions. Word has length 12 [2021-10-07 14:55:36,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:36,899 INFO L470 AbstractCegarLoop]: Abstraction has 47100 states and 222317 transitions. [2021-10-07 14:55:36,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:36,900 INFO L276 IsEmpty]: Start isEmpty. Operand 47100 states and 222317 transitions. [2021-10-07 14:55:36,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 14:55:36,903 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:36,903 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:36,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-07 14:55:37,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:37,105 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:37,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:37,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1933369571, now seen corresponding path program 3 times [2021-10-07 14:55:37,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:37,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513299409] [2021-10-07 14:55:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:37,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:37,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:37,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513299409] [2021-10-07 14:55:37,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513299409] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:37,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329347892] [2021-10-07 14:55:37,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 14:55:37,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:37,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:37,252 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:55:37,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-07 14:55:37,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 14:55:37,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:55:37,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-07 14:55:37,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:38,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329347892] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:38,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:55:38,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2021-10-07 14:55:38,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728625531] [2021-10-07 14:55:38,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 14:55:38,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:38,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 14:55:38,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-07 14:55:38,124 INFO L87 Difference]: Start difference. First operand 47100 states and 222317 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:41,354 INFO L93 Difference]: Finished difference Result 103340 states and 452367 transitions. [2021-10-07 14:55:41,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 14:55:41,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-07 14:55:41,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:42,115 INFO L225 Difference]: With dead ends: 103340 [2021-10-07 14:55:42,116 INFO L226 Difference]: Without dead ends: 103272 [2021-10-07 14:55:42,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 423.5ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-10-07 14:55:42,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103272 states. [2021-10-07 14:55:45,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103272 to 61784. [2021-10-07 14:55:45,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61784 states, 61660 states have (on average 4.704313979889718) internal successors, (290068), 61783 states have internal predecessors, (290068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61784 states to 61784 states and 290068 transitions. [2021-10-07 14:55:46,164 INFO L78 Accepts]: Start accepts. Automaton has 61784 states and 290068 transitions. Word has length 12 [2021-10-07 14:55:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:46,165 INFO L470 AbstractCegarLoop]: Abstraction has 61784 states and 290068 transitions. [2021-10-07 14:55:46,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:46,166 INFO L276 IsEmpty]: Start isEmpty. Operand 61784 states and 290068 transitions. [2021-10-07 14:55:46,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 14:55:46,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:46,183 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:46,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-07 14:55:46,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-07 14:55:46,384 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:46,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:46,385 INFO L82 PathProgramCache]: Analyzing trace with hash 625665072, now seen corresponding path program 6 times [2021-10-07 14:55:46,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:46,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098540316] [2021-10-07 14:55:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:46,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:46,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:46,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098540316] [2021-10-07 14:55:46,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098540316] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:46,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995778629] [2021-10-07 14:55:46,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 14:55:46,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:46,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:46,614 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:55:46,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-07 14:55:46,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-07 14:55:46,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:55:46,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 14:55:46,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-07 14:55:46,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995778629] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:55:46,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 14:55:46,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2021-10-07 14:55:46,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432273610] [2021-10-07 14:55:46,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 14:55:46,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:46,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 14:55:46,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-07 14:55:46,929 INFO L87 Difference]: Start difference. First operand 61784 states and 290068 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:48,104 INFO L93 Difference]: Finished difference Result 61480 states and 280401 transitions. [2021-10-07 14:55:48,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 14:55:48,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 14:55:48,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:48,524 INFO L225 Difference]: With dead ends: 61480 [2021-10-07 14:55:48,524 INFO L226 Difference]: Without dead ends: 61312 [2021-10-07 14:55:48,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-07 14:55:48,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61312 states. [2021-10-07 14:55:50,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61312 to 51038. [2021-10-07 14:55:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51038 states, 50914 states have (on average 4.59942255568213) internal successors, (234175), 51037 states have internal predecessors, (234175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51038 states to 51038 states and 234175 transitions. [2021-10-07 14:55:51,235 INFO L78 Accepts]: Start accepts. Automaton has 51038 states and 234175 transitions. Word has length 13 [2021-10-07 14:55:51,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:51,235 INFO L470 AbstractCegarLoop]: Abstraction has 51038 states and 234175 transitions. [2021-10-07 14:55:51,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:51,236 INFO L276 IsEmpty]: Start isEmpty. Operand 51038 states and 234175 transitions. [2021-10-07 14:55:51,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 14:55:51,242 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:51,242 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:51,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-07 14:55:51,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-07 14:55:51,455 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:51,456 INFO L82 PathProgramCache]: Analyzing trace with hash -267144052, now seen corresponding path program 1 times [2021-10-07 14:55:51,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:51,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874426946] [2021-10-07 14:55:51,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:51,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:51,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:51,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874426946] [2021-10-07 14:55:51,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874426946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:51,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835467317] [2021-10-07 14:55:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:51,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:51,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:51,503 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:55:51,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-07 14:55:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:51,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 14:55:51,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:51,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835467317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:51,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:55:51,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2021-10-07 14:55:51,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836856984] [2021-10-07 14:55:51,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-07 14:55:51,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:51,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-07 14:55:51,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-10-07 14:55:51,925 INFO L87 Difference]: Start difference. First operand 51038 states and 234175 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:53,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:53,699 INFO L93 Difference]: Finished difference Result 84886 states and 378990 transitions. [2021-10-07 14:55:53,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 14:55:53,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 14:55:53,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:54,281 INFO L225 Difference]: With dead ends: 84886 [2021-10-07 14:55:54,281 INFO L226 Difference]: Without dead ends: 84792 [2021-10-07 14:55:54,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-10-07 14:55:54,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84792 states. [2021-10-07 14:55:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84792 to 63468. [2021-10-07 14:55:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63468 states, 63344 states have (on average 4.721299570598636) internal successors, (299066), 63467 states have internal predecessors, (299066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:57,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63468 states to 63468 states and 299066 transitions. [2021-10-07 14:55:57,504 INFO L78 Accepts]: Start accepts. Automaton has 63468 states and 299066 transitions. Word has length 14 [2021-10-07 14:55:57,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:57,504 INFO L470 AbstractCegarLoop]: Abstraction has 63468 states and 299066 transitions. [2021-10-07 14:55:57,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 63468 states and 299066 transitions. [2021-10-07 14:55:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 14:55:57,511 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:57,511 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:57,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-07 14:55:57,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:57,720 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:55:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:57,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1784583013, now seen corresponding path program 4 times [2021-10-07 14:55:57,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:57,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857571415] [2021-10-07 14:55:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:57,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:55:58,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:58,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857571415] [2021-10-07 14:55:58,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857571415] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:58,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632949706] [2021-10-07 14:55:58,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 14:55:58,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:58,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:58,397 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:55:58,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-07 14:55:58,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 14:55:58,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:55:58,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 14:55:58,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 14:55:59,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632949706] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:59,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:55:59,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 14:55:59,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308621681] [2021-10-07 14:55:59,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 14:55:59,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:59,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 14:55:59,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-10-07 14:55:59,565 INFO L87 Difference]: Start difference. First operand 63468 states and 299066 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:56:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:56:02,225 INFO L93 Difference]: Finished difference Result 108214 states and 481870 transitions. [2021-10-07 14:56:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 14:56:02,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 14:56:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:56:03,568 INFO L225 Difference]: With dead ends: 108214 [2021-10-07 14:56:03,568 INFO L226 Difference]: Without dead ends: 108068 [2021-10-07 14:56:03,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 342.1ms TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2021-10-07 14:56:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108068 states. [2021-10-07 14:56:06,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108068 to 75548. [2021-10-07 14:56:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75548 states, 75424 states have (on average 4.720394039032668) internal successors, (356031), 75547 states have internal predecessors, (356031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:56:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75548 states to 75548 states and 356031 transitions. [2021-10-07 14:56:08,184 INFO L78 Accepts]: Start accepts. Automaton has 75548 states and 356031 transitions. Word has length 14 [2021-10-07 14:56:08,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:56:08,184 INFO L470 AbstractCegarLoop]: Abstraction has 75548 states and 356031 transitions. [2021-10-07 14:56:08,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:56:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 75548 states and 356031 transitions. [2021-10-07 14:56:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 14:56:08,192 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:56:08,193 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:56:08,221 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 [2021-10-07 14:56:08,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:56:08,408 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:56:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:56:08,408 INFO L82 PathProgramCache]: Analyzing trace with hash -789107435, now seen corresponding path program 2 times [2021-10-07 14:56:08,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:56:08,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167780920] [2021-10-07 14:56:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:56:08,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:56:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:56:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:56:08,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:56:08,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167780920] [2021-10-07 14:56:08,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167780920] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:56:08,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540832769] [2021-10-07 14:56:08,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 14:56:08,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:56:08,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:56:08,609 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:56:08,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-07 14:56:08,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 14:56:08,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:56:08,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 14:56:08,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:56:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:56:10,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540832769] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:56:10,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:56:10,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2021-10-07 14:56:10,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141572737] [2021-10-07 14:56:10,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 14:56:10,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:56:10,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 14:56:10,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-10-07 14:56:10,356 INFO L87 Difference]: Start difference. First operand 75548 states and 356031 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:56:15,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:56:15,364 INFO L93 Difference]: Finished difference Result 162506 states and 747152 transitions. [2021-10-07 14:56:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 14:56:15,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 14:56:15,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:56:17,584 INFO L225 Difference]: With dead ends: 162506 [2021-10-07 14:56:17,585 INFO L226 Difference]: Without dead ends: 162478 [2021-10-07 14:56:17,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 667.7ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-10-07 14:56:17,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162478 states. [2021-10-07 14:56:22,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162478 to 104434. [2021-10-07 14:56:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104434 states, 104305 states have (on average 4.867724461914578) internal successors, (507728), 104433 states have internal predecessors, (507728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:56:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104434 states to 104434 states and 507728 transitions. [2021-10-07 14:56:23,790 INFO L78 Accepts]: Start accepts. Automaton has 104434 states and 507728 transitions. Word has length 15 [2021-10-07 14:56:23,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:56:23,791 INFO L470 AbstractCegarLoop]: Abstraction has 104434 states and 507728 transitions. [2021-10-07 14:56:23,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:56:23,791 INFO L276 IsEmpty]: Start isEmpty. Operand 104434 states and 507728 transitions. [2021-10-07 14:56:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 14:56:23,814 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:56:23,814 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:56:23,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-07 14:56:24,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-07 14:56:24,021 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:56:24,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:56:24,022 INFO L82 PathProgramCache]: Analyzing trace with hash -32237175, now seen corresponding path program 1 times [2021-10-07 14:56:24,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:56:24,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459404965] [2021-10-07 14:56:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:56:24,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:56:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:56:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:56:24,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:56:24,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459404965] [2021-10-07 14:56:24,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459404965] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:56:24,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782963981] [2021-10-07 14:56:24,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:56:24,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:56:24,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:56:24,232 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:56:24,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-07 14:56:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:56:24,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-07 14:56:24,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:56:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:56:26,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782963981] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:56:26,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:56:26,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2021-10-07 14:56:26,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325265774] [2021-10-07 14:56:26,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 14:56:26,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:56:26,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 14:56:26,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-07 14:56:26,264 INFO L87 Difference]: Start difference. First operand 104434 states and 507728 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:56:40,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:56:40,089 INFO L93 Difference]: Finished difference Result 384008 states and 1707497 transitions. [2021-10-07 14:56:40,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-10-07 14:56:40,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 14:56:40,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:56:45,388 INFO L225 Difference]: With dead ends: 384008 [2021-10-07 14:56:45,388 INFO L226 Difference]: Without dead ends: 383686 [2021-10-07 14:56:45,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 4702.0ms TimeCoverageRelationStatistics Valid=1161, Invalid=6321, Unknown=0, NotChecked=0, Total=7482 [2021-10-07 14:56:46,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383686 states. [2021-10-07 14:57:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383686 to 245282. [2021-10-07 14:57:04,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245282 states, 245153 states have (on average 4.890917100749328) internal successors, (1199023), 245281 states have internal predecessors, (1199023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:57:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245282 states to 245282 states and 1199023 transitions. [2021-10-07 14:57:08,280 INFO L78 Accepts]: Start accepts. Automaton has 245282 states and 1199023 transitions. Word has length 15 [2021-10-07 14:57:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:57:08,280 INFO L470 AbstractCegarLoop]: Abstraction has 245282 states and 1199023 transitions. [2021-10-07 14:57:08,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:57:08,281 INFO L276 IsEmpty]: Start isEmpty. Operand 245282 states and 1199023 transitions. [2021-10-07 14:57:08,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 14:57:08,292 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:57:08,292 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:57:08,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-07 14:57:08,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:57:08,493 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:57:08,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:57:08,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1931853929, now seen corresponding path program 3 times [2021-10-07 14:57:08,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:57:08,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317029852] [2021-10-07 14:57:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:57:08,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:57:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:57:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:57:09,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:57:09,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317029852] [2021-10-07 14:57:09,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317029852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:57:09,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198402379] [2021-10-07 14:57:09,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 14:57:09,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:57:09,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:57:09,235 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:57:09,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-07 14:57:09,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 14:57:09,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:57:09,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 14:57:09,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:57:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 14:57:09,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198402379] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:57:09,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 14:57:09,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2021-10-07 14:57:09,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208950006] [2021-10-07 14:57:09,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 14:57:09,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:57:09,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 14:57:09,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-07 14:57:09,700 INFO L87 Difference]: Start difference. First operand 245282 states and 1199023 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:57:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:57:11,313 INFO L93 Difference]: Finished difference Result 96264 states and 425680 transitions. [2021-10-07 14:57:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 14:57:11,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 14:57:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:57:12,045 INFO L225 Difference]: With dead ends: 96264 [2021-10-07 14:57:12,045 INFO L226 Difference]: Without dead ends: 95908 [2021-10-07 14:57:12,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-07 14:57:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95908 states. [2021-10-07 14:57:15,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95908 to 80338. [2021-10-07 14:57:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80338 states, 80210 states have (on average 4.437588829323027) internal successors, (355939), 80337 states have internal predecessors, (355939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:57:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80338 states to 80338 states and 355939 transitions. [2021-10-07 14:57:16,437 INFO L78 Accepts]: Start accepts. Automaton has 80338 states and 355939 transitions. Word has length 15 [2021-10-07 14:57:16,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:57:16,437 INFO L470 AbstractCegarLoop]: Abstraction has 80338 states and 355939 transitions. [2021-10-07 14:57:16,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:57:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 80338 states and 355939 transitions. [2021-10-07 14:57:16,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 14:57:16,446 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:57:16,446 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:57:16,475 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 [2021-10-07 14:57:16,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:57:16,654 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:57:16,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:57:16,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1931853954, now seen corresponding path program 1 times [2021-10-07 14:57:16,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:57:16,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365419227] [2021-10-07 14:57:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:57:16,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:57:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:57:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:57:16,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:57:16,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365419227] [2021-10-07 14:57:16,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365419227] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:57:16,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064363996] [2021-10-07 14:57:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:57:16,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:57:16,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:57:16,829 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:57:16,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-07 14:57:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:57:17,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 14:57:17,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:57:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 14:57:18,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064363996] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:57:18,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:57:18,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 14:57:18,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261398633] [2021-10-07 14:57:18,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 14:57:18,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:57:18,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 14:57:18,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-10-07 14:57:18,248 INFO L87 Difference]: Start difference. First operand 80338 states and 355939 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:57:23,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:57:23,088 INFO L93 Difference]: Finished difference Result 167018 states and 698581 transitions. [2021-10-07 14:57:23,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 14:57:23,088 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 14:57:23,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:57:25,735 INFO L225 Difference]: With dead ends: 167018 [2021-10-07 14:57:25,735 INFO L226 Difference]: Without dead ends: 166966 [2021-10-07 14:57:25,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 749.5ms TimeCoverageRelationStatistics Valid=385, Invalid=671, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 14:57:25,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166966 states. [2021-10-07 14:57:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166966 to 108536. [2021-10-07 14:57:30,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108536 states, 108412 states have (on average 4.409760912076154) internal successors, (478071), 108535 states have internal predecessors, (478071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:57:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108536 states to 108536 states and 478071 transitions. [2021-10-07 14:57:31,994 INFO L78 Accepts]: Start accepts. Automaton has 108536 states and 478071 transitions. Word has length 15 [2021-10-07 14:57:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:57:31,995 INFO L470 AbstractCegarLoop]: Abstraction has 108536 states and 478071 transitions. [2021-10-07 14:57:31,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:57:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 108536 states and 478071 transitions. [2021-10-07 14:57:32,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 14:57:32,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:57:32,002 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:57:32,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-07 14:57:32,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-07 14:57:32,203 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:57:32,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:57:32,204 INFO L82 PathProgramCache]: Analyzing trace with hash 778137972, now seen corresponding path program 1 times [2021-10-07 14:57:32,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:57:32,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030093862] [2021-10-07 14:57:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:57:32,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:57:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:57:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:57:32,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:57:32,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030093862] [2021-10-07 14:57:32,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030093862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:57:32,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327016159] [2021-10-07 14:57:32,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:57:32,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:57:32,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:57:32,258 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:57:32,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-07 14:57:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:57:32,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 14:57:32,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:57:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:57:33,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327016159] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:57:33,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:57:33,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-07 14:57:33,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656980920] [2021-10-07 14:57:33,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 14:57:33,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:57:33,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 14:57:33,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-10-07 14:57:33,077 INFO L87 Difference]: Start difference. First operand 108536 states and 478071 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:57:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:57:36,767 INFO L93 Difference]: Finished difference Result 187514 states and 797582 transitions. [2021-10-07 14:57:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 14:57:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 14:57:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:57:39,088 INFO L225 Difference]: With dead ends: 187514 [2021-10-07 14:57:39,088 INFO L226 Difference]: Without dead ends: 186756 [2021-10-07 14:57:39,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2021-10-07 14:57:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186756 states. [2021-10-07 14:57:45,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186756 to 124954. [2021-10-07 14:57:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124954 states, 124838 states have (on average 4.4247905285249685) internal successors, (552382), 124953 states have internal predecessors, (552382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:57:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124954 states to 124954 states and 552382 transitions. [2021-10-07 14:57:48,109 INFO L78 Accepts]: Start accepts. Automaton has 124954 states and 552382 transitions. Word has length 15 [2021-10-07 14:57:48,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:57:48,110 INFO L470 AbstractCegarLoop]: Abstraction has 124954 states and 552382 transitions. [2021-10-07 14:57:48,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:57:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 124954 states and 552382 transitions. [2021-10-07 14:57:48,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 14:57:48,118 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:57:48,119 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:57:48,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-07 14:57:48,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-07 14:57:48,321 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:57:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:57:48,322 INFO L82 PathProgramCache]: Analyzing trace with hash -591741908, now seen corresponding path program 2 times [2021-10-07 14:57:48,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:57:48,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108465445] [2021-10-07 14:57:48,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:57:48,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:57:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:57:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:57:48,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:57:48,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108465445] [2021-10-07 14:57:48,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108465445] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:57:48,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851301936] [2021-10-07 14:57:48,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 14:57:48,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:57:48,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:57:48,415 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:57:48,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-07 14:57:48,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 14:57:48,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:57:48,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 14:57:48,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:57:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:57:49,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851301936] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:57:49,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:57:49,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-07 14:57:49,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796359808] [2021-10-07 14:57:49,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 14:57:49,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:57:49,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 14:57:49,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-10-07 14:57:49,104 INFO L87 Difference]: Start difference. First operand 124954 states and 552382 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:57:53,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:57:53,341 INFO L93 Difference]: Finished difference Result 231766 states and 980200 transitions. [2021-10-07 14:57:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 14:57:53,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 14:57:53,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:57:56,101 INFO L225 Difference]: With dead ends: 231766 [2021-10-07 14:57:56,101 INFO L226 Difference]: Without dead ends: 231502 [2021-10-07 14:57:56,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-10-07 14:57:57,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231502 states. [2021-10-07 14:58:04,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231502 to 149386. [2021-10-07 14:58:05,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149386 states, 149270 states have (on average 4.44537415421719) internal successors, (663561), 149385 states have internal predecessors, (663561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:58:07,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149386 states to 149386 states and 663561 transitions. [2021-10-07 14:58:07,440 INFO L78 Accepts]: Start accepts. Automaton has 149386 states and 663561 transitions. Word has length 15 [2021-10-07 14:58:07,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:58:07,441 INFO L470 AbstractCegarLoop]: Abstraction has 149386 states and 663561 transitions. [2021-10-07 14:58:07,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:58:07,442 INFO L276 IsEmpty]: Start isEmpty. Operand 149386 states and 663561 transitions. [2021-10-07 14:58:07,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 14:58:07,453 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:58:07,453 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:58:07,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-07 14:58:07,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-07 14:58:07,654 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:58:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:58:07,655 INFO L82 PathProgramCache]: Analyzing trace with hash -999350900, now seen corresponding path program 2 times [2021-10-07 14:58:07,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:58:07,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308216476] [2021-10-07 14:58:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:58:07,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:58:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:58:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-07 14:58:07,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:58:07,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308216476] [2021-10-07 14:58:07,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308216476] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:58:07,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072319182] [2021-10-07 14:58:07,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 14:58:07,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:58:07,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:58:07,729 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:58:07,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-07 14:58:08,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 14:58:08,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:58:08,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-07 14:58:08,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:58:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 14:58:08,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072319182] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:58:08,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:58:08,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-10-07 14:58:08,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408628884] [2021-10-07 14:58:08,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-07 14:58:08,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:58:08,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-07 14:58:08,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-07 14:58:08,392 INFO L87 Difference]: Start difference. First operand 149386 states and 663561 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:58:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:58:13,219 INFO L93 Difference]: Finished difference Result 212380 states and 914867 transitions. [2021-10-07 14:58:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 14:58:13,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 14:58:13,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:58:15,884 INFO L225 Difference]: With dead ends: 212380 [2021-10-07 14:58:15,884 INFO L226 Difference]: Without dead ends: 212374 [2021-10-07 14:58:15,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-10-07 14:58:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212374 states. [2021-10-07 14:58:25,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212374 to 153708. [2021-10-07 14:58:26,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153708 states, 153592 states have (on average 4.4412860044794) internal successors, (682146), 153707 states have internal predecessors, (682146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:58:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153708 states to 153708 states and 682146 transitions. [2021-10-07 14:58:29,057 INFO L78 Accepts]: Start accepts. Automaton has 153708 states and 682146 transitions. Word has length 16 [2021-10-07 14:58:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:58:29,057 INFO L470 AbstractCegarLoop]: Abstraction has 153708 states and 682146 transitions. [2021-10-07 14:58:29,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:58:29,057 INFO L276 IsEmpty]: Start isEmpty. Operand 153708 states and 682146 transitions. [2021-10-07 14:58:29,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 14:58:29,072 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:58:29,072 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:58:29,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-07 14:58:29,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-07 14:58:29,285 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:58:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:58:29,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1949385890, now seen corresponding path program 3 times [2021-10-07 14:58:29,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:58:29,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690611766] [2021-10-07 14:58:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:58:29,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:58:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:58:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:58:29,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:58:29,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690611766] [2021-10-07 14:58:29,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690611766] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:58:29,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591869181] [2021-10-07 14:58:29,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 14:58:29,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:58:29,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:58:29,567 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:58:29,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-07 14:58:30,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 14:58:30,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:58:30,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-07 14:58:30,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:58:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:58:31,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591869181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:58:31,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:58:31,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2021-10-07 14:58:31,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687223310] [2021-10-07 14:58:31,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 14:58:31,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:58:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 14:58:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-10-07 14:58:31,596 INFO L87 Difference]: Start difference. First operand 153708 states and 682146 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:58:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:58:42,692 INFO L93 Difference]: Finished difference Result 428626 states and 1831359 transitions. [2021-10-07 14:58:42,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-07 14:58:42,692 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 14:58:42,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:58:48,828 INFO L225 Difference]: With dead ends: 428626 [2021-10-07 14:58:48,828 INFO L226 Difference]: Without dead ends: 428332 [2021-10-07 14:58:48,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1662.9ms TimeCoverageRelationStatistics Valid=796, Invalid=2174, Unknown=0, NotChecked=0, Total=2970 [2021-10-07 14:58:49,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428332 states. [2021-10-07 14:59:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428332 to 248758. [2021-10-07 14:59:08,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248758 states, 248642 states have (on average 4.478631928636353) internal successors, (1113576), 248757 states have internal predecessors, (1113576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:59:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248758 states to 248758 states and 1113576 transitions. [2021-10-07 14:59:12,637 INFO L78 Accepts]: Start accepts. Automaton has 248758 states and 1113576 transitions. Word has length 16 [2021-10-07 14:59:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:59:12,637 INFO L470 AbstractCegarLoop]: Abstraction has 248758 states and 1113576 transitions. [2021-10-07 14:59:12,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:59:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 248758 states and 1113576 transitions. [2021-10-07 14:59:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 14:59:12,655 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:59:12,655 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:59:12,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-07 14:59:12,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-07 14:59:12,871 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 14:59:12,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:59:12,872 INFO L82 PathProgramCache]: Analyzing trace with hash -12438132, now seen corresponding path program 3 times [2021-10-07 14:59:12,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:59:12,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065765339] [2021-10-07 14:59:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:59:12,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:59:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:59:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:59:13,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:59:13,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065765339] [2021-10-07 14:59:13,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065765339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:59:13,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256408567] [2021-10-07 14:59:13,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 14:59:13,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:59:13,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:59:13,023 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 14:59:13,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-07 14:59:13,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 14:59:13,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:59:13,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-07 14:59:13,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:59:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:59:14,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256408567] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:59:14,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:59:14,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2021-10-07 14:59:14,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388521245] [2021-10-07 14:59:14,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 14:59:14,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:59:14,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 14:59:14,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-10-07 14:59:14,311 INFO L87 Difference]: Start difference. First operand 248758 states and 1113576 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:59:32,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:59:32,876 INFO L93 Difference]: Finished difference Result 604330 states and 2618750 transitions. [2021-10-07 14:59:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 14:59:32,876 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 14:59:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:59:41,008 INFO L225 Difference]: With dead ends: 604330 [2021-10-07 14:59:41,008 INFO L226 Difference]: Without dead ends: 604206 [2021-10-07 14:59:41,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 565.1ms TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2021-10-07 14:59:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604206 states. [2021-10-07 15:00:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604206 to 455336. [2021-10-07 15:00:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455336 states, 455220 states have (on average 4.51611748165722) internal successors, (2055827), 455335 states have internal predecessors, (2055827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:00:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455336 states to 455336 states and 2055827 transitions. [2021-10-07 15:00:28,687 INFO L78 Accepts]: Start accepts. Automaton has 455336 states and 2055827 transitions. Word has length 17 [2021-10-07 15:00:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:00:28,687 INFO L470 AbstractCegarLoop]: Abstraction has 455336 states and 2055827 transitions. [2021-10-07 15:00:28,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:00:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 455336 states and 2055827 transitions. [2021-10-07 15:00:28,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:00:28,711 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:00:28,712 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:00:28,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-07 15:00:28,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-07 15:00:28,925 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-07 15:00:28,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:00:28,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1821204291, now seen corresponding path program 1 times [2021-10-07 15:00:28,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:00:28,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852035202] [2021-10-07 15:00:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:00:28,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:00:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:00:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 15:00:29,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:00:29,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852035202] [2021-10-07 15:00:29,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852035202] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:00:29,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:00:29,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-07 15:00:29,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325093144] [2021-10-07 15:00:29,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 15:00:29,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:00:29,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 15:00:29,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 15:00:29,696 INFO L87 Difference]: Start difference. First operand 455336 states and 2055827 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)