/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 19:44:09,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 19:44:09,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 19:44:09,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 19:44:09,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 19:44:09,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 19:44:09,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 19:44:09,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 19:44:09,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 19:44:09,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 19:44:09,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 19:44:09,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-15 19:44:09,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-15 19:44:09,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-15 19:44:09,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-15 19:44:09,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-15 19:44:09,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-15 19:44:09,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-15 19:44:09,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-15 19:44:09,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-15 19:44:09,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-15 19:44:09,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-15 19:44:09,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-15 19:44:09,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-15 19:44:09,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-15 19:44:09,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-15 19:44:09,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-15 19:44:09,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-15 19:44:09,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-15 19:44:09,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-15 19:44:09,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-15 19:44:09,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-15 19:44:09,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-15 19:44:09,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-15 19:44:09,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-15 19:44:09,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-15 19:44:09,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-15 19:44:09,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-15 19:44:09,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 19:44:09,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 19:44:09,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 19:44:09,250 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2022-03-15 19:44:09,280 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 19:44:09,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 19:44:09,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 19:44:09,281 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 19:44:09,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 19:44:09,282 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 19:44:09,282 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 19:44:09,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 19:44:09,282 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 19:44:09,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 19:44:09,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 19:44:09,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 19:44:09,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 19:44:09,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 19:44:09,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 19:44:09,284 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 19:44:09,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 19:44:09,284 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 19:44:09,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 19:44:09,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 19:44:09,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 19:44:09,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 19:44:09,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 19:44:09,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 19:44:09,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 19:44:09,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 19:44:09,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 19:44:09,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 19:44:09,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 19:44:09,285 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 19:44:09,286 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 19:44:09,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 19:44:09,286 INFO L138 SettingsManager]: * Interpolant automaton=MCR 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 19:44:09,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 19:44:09,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 19:44:09,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 19:44:09,539 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-15 19:44:09,540 INFO L275 PluginConnector]: CDTParser initialized [2022-03-15 19:44:09,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2022-03-15 19:44:09,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d363cd971/8851393a6436401d805b69ebb69e6a99/FLAGc2363b460 [2022-03-15 19:44:10,003 INFO L306 CDTParser]: Found 1 translation units. [2022-03-15 19:44:10,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2022-03-15 19:44:10,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d363cd971/8851393a6436401d805b69ebb69e6a99/FLAGc2363b460 [2022-03-15 19:44:10,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d363cd971/8851393a6436401d805b69ebb69e6a99 [2022-03-15 19:44:10,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 19:44:10,036 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-15 19:44:10,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-15 19:44:10,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-15 19:44:10,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-15 19:44:10,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.03 07:44:10" (1/1) ... [2022-03-15 19:44:10,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67cd89be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:44:10, skipping insertion in model container [2022-03-15 19:44:10,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.03 07:44:10" (1/1) ... [2022-03-15 19:44:10,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-15 19:44:10,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-15 19:44:10,244 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-03-15 19:44:10,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-15 19:44:10,271 INFO L203 MainTranslator]: Completed pre-run [2022-03-15 19:44:10,298 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-03-15 19:44:10,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-15 19:44:10,312 INFO L208 MainTranslator]: Completed translation [2022-03-15 19:44:10,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:44:10 WrapperNode [2022-03-15 19:44:10,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-15 19:44:10,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 19:44:10,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 19:44:10,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 19:44:10,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:44:10" (1/1) ... [2022-03-15 19:44:10,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:44:10" (1/1) ... [2022-03-15 19:44:10,342 INFO L137 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 121 [2022-03-15 19:44:10,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 19:44:10,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 19:44:10,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 19:44:10,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 19:44:10,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:44:10" (1/1) ... [2022-03-15 19:44:10,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:44:10" (1/1) ... [2022-03-15 19:44:10,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:44:10" (1/1) ... [2022-03-15 19:44:10,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:44:10" (1/1) ... [2022-03-15 19:44:10,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:44:10" (1/1) ... [2022-03-15 19:44:10,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:44:10" (1/1) ... [2022-03-15 19:44:10,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:44:10" (1/1) ... [2022-03-15 19:44:10,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 19:44:10,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 19:44:10,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 19:44:10,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 19:44:10,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:44:10" (1/1) ... [2022-03-15 19:44:10,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 19:44:10,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:10,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 19:44:10,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 19:44:10,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-15 19:44:10,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-15 19:44:10,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-15 19:44:10,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-15 19:44:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 19:44:10,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 19:44:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 19:44:10,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 19:44:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 19:44:10,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 19:44:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-15 19:44:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-03-15 19:44:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-03-15 19:44:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-15 19:44:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 19:44:10,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 19:44:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-15 19:44:10,426 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 19:44:10,496 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 19:44:10,497 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 19:44:10,755 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 19:44:10,784 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 19:44:10,785 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-15 19:44:10,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 07:44:10 BoogieIcfgContainer [2022-03-15 19:44:10,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 19:44:10,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 19:44:10,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 19:44:10,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 19:44:10,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.03 07:44:10" (1/3) ... [2022-03-15 19:44:10,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c985dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 07:44:10, skipping insertion in model container [2022-03-15 19:44:10,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 07:44:10" (2/3) ... [2022-03-15 19:44:10,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c985dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 07:44:10, skipping insertion in model container [2022-03-15 19:44:10,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 07:44:10" (3/3) ... [2022-03-15 19:44:10,794 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2022-03-15 19:44:10,798 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 19:44:10,798 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 19:44:10,798 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 19:44:10,798 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 19:44:10,833 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,834 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,834 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,834 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,835 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,835 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,835 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,835 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,836 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,836 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,836 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,836 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,836 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,837 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,837 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,837 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,837 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,838 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,838 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,838 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,838 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,838 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,838 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,838 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,839 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,839 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,839 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,839 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,840 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,840 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,840 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,840 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,841 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,841 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,841 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,841 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,841 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,842 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,842 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,842 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,843 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,843 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,843 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,843 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,844 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,844 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,844 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,844 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,844 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,845 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,845 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,845 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,845 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,845 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,846 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,846 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,846 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,846 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,847 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,847 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,847 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,847 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,847 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,847 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,848 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,848 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,848 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,848 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,849 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,849 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,849 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,849 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,849 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,850 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,850 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,850 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,850 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,851 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,851 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,851 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,851 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,851 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,851 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,852 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,852 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,852 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,855 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,855 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,856 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,856 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,857 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,857 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,857 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,857 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,858 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,858 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,858 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,858 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,858 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,859 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 19:44:10,862 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-15 19:44:10,918 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 19:44:10,926 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 19:44:10,926 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 19:44:10,943 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 19:44:10,952 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 186 transitions, 396 flow [2022-03-15 19:44:10,954 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 186 transitions, 396 flow [2022-03-15 19:44:10,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 180 places, 186 transitions, 396 flow [2022-03-15 19:44:11,033 INFO L129 PetriNetUnfolder]: 16/183 cut-off events. [2022-03-15 19:44:11,034 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-03-15 19:44:11,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 183 events. 16/183 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 116 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 142. Up to 3 conditions per place. [2022-03-15 19:44:11,045 INFO L116 LiptonReduction]: Number of co-enabled transitions 1720 [2022-03-15 19:44:15,902 INFO L131 LiptonReduction]: Checked pairs total: 2550 [2022-03-15 19:44:15,903 INFO L133 LiptonReduction]: Total number of compositions: 180 [2022-03-15 19:44:15,909 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 90 flow [2022-03-15 19:44:15,942 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 172 states, 171 states have (on average 3.3567251461988303) internal successors, (574), 171 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand has 172 states, 171 states have (on average 3.3567251461988303) internal successors, (574), 171 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:15,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 19:44:15,954 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:15,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:15,955 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:15,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:15,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1036270016, now seen corresponding path program 1 times [2022-03-15 19:44:15,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:15,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386682182] [2022-03-15 19:44:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:15,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:44:16,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:16,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386682182] [2022-03-15 19:44:16,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386682182] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:44:16,428 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:44:16,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 19:44:16,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1387579146] [2022-03-15 19:44:16,430 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:16,435 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:16,466 INFO L252 McrAutomatonBuilder]: Finished intersection with 108 states and 245 transitions. [2022-03-15 19:44:16,466 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:18,337 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:44:18,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 19:44:18,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:18,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 19:44:18,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 19:44:18,361 INFO L87 Difference]: Start difference. First operand has 172 states, 171 states have (on average 3.3567251461988303) internal successors, (574), 171 states have internal predecessors, (574), 0 states have call successors, (0), 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 4 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2022-03-15 19:44:18,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:18,444 INFO L93 Difference]: Finished difference Result 342 states and 1146 transitions. [2022-03-15 19:44:18,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 19:44:18,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 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 21 [2022-03-15 19:44:18,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:18,462 INFO L225 Difference]: With dead ends: 342 [2022-03-15 19:44:18,462 INFO L226 Difference]: Without dead ends: 323 [2022-03-15 19:44:18,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 19:44:18,467 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:18,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 6 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:44:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-03-15 19:44:18,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 289. [2022-03-15 19:44:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.392361111111111) internal successors, (977), 288 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:18,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 977 transitions. [2022-03-15 19:44:18,540 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 977 transitions. Word has length 21 [2022-03-15 19:44:18,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:18,541 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 977 transitions. [2022-03-15 19:44:18,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2022-03-15 19:44:18,541 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 977 transitions. [2022-03-15 19:44:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 19:44:18,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:18,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:18,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 19:44:18,551 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash -519393664, now seen corresponding path program 1 times [2022-03-15 19:44:18,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:18,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660855877] [2022-03-15 19:44:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:18,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:44:18,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:18,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660855877] [2022-03-15 19:44:18,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660855877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:18,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751499962] [2022-03-15 19:44:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:18,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:18,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:18,687 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:18,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 19:44:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:18,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 19:44:18,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:44:18,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:44:18,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751499962] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:18,960 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 19:44:18,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-03-15 19:44:18,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1276041803] [2022-03-15 19:44:18,961 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:18,963 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:18,983 INFO L252 McrAutomatonBuilder]: Finished intersection with 109 states and 246 transitions. [2022-03-15 19:44:18,983 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:19,394 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:44:19,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 19:44:19,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 19:44:19,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-15 19:44:19,395 INFO L87 Difference]: Start difference. First operand 289 states and 977 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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) [2022-03-15 19:44:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:19,490 INFO L93 Difference]: Finished difference Result 556 states and 1891 transitions. [2022-03-15 19:44:19,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 19:44:19,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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 22 [2022-03-15 19:44:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:19,494 INFO L225 Difference]: With dead ends: 556 [2022-03-15 19:44:19,494 INFO L226 Difference]: Without dead ends: 556 [2022-03-15 19:44:19,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-15 19:44:19,496 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:19,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 15 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:44:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-03-15 19:44:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 290. [2022-03-15 19:44:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.384083044982699) internal successors, (978), 289 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:19,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 978 transitions. [2022-03-15 19:44:19,511 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 978 transitions. Word has length 22 [2022-03-15 19:44:19,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:19,511 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 978 transitions. [2022-03-15 19:44:19,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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) [2022-03-15 19:44:19,511 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 978 transitions. [2022-03-15 19:44:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 19:44:19,513 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:19,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:19,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:19,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:19,728 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:19,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1071384234, now seen corresponding path program 1 times [2022-03-15 19:44:19,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:19,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114911520] [2022-03-15 19:44:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:19,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:44:19,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:19,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114911520] [2022-03-15 19:44:19,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114911520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:44:19,805 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:44:19,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 19:44:19,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1114803835] [2022-03-15 19:44:19,805 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:19,808 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:19,829 INFO L252 McrAutomatonBuilder]: Finished intersection with 124 states and 292 transitions. [2022-03-15 19:44:19,829 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:20,442 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:44:20,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 19:44:20,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:20,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 19:44:20,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 19:44:20,444 INFO L87 Difference]: Start difference. First operand 290 states and 978 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:20,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:20,571 INFO L93 Difference]: Finished difference Result 614 states and 2007 transitions. [2022-03-15 19:44:20,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 19:44:20,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 19:44:20,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:20,575 INFO L225 Difference]: With dead ends: 614 [2022-03-15 19:44:20,575 INFO L226 Difference]: Without dead ends: 582 [2022-03-15 19:44:20,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 19:44:20,577 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:20,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 15 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:44:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-03-15 19:44:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 322. [2022-03-15 19:44:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.364485981308411) internal successors, (1080), 321 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1080 transitions. [2022-03-15 19:44:20,590 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1080 transitions. Word has length 22 [2022-03-15 19:44:20,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:20,590 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1080 transitions. [2022-03-15 19:44:20,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:20,590 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1080 transitions. [2022-03-15 19:44:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 19:44:20,591 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:20,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:20,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 19:44:20,592 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:20,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash -658110734, now seen corresponding path program 1 times [2022-03-15 19:44:20,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:20,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595727974] [2022-03-15 19:44:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:20,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:44:20,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:20,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595727974] [2022-03-15 19:44:20,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595727974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:20,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69353677] [2022-03-15 19:44:20,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:20,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:20,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:20,662 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:20,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 19:44:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:20,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 19:44:20,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:44:20,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 19:44:20,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69353677] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:20,868 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 19:44:20,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-03-15 19:44:20,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1812566881] [2022-03-15 19:44:20,869 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:20,873 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:20,910 INFO L252 McrAutomatonBuilder]: Finished intersection with 110 states and 247 transitions. [2022-03-15 19:44:20,911 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:21,323 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:44:21,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 19:44:21,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:21,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 19:44:21,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-15 19:44:21,325 INFO L87 Difference]: Start difference. First operand 322 states and 1080 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:21,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:21,461 INFO L93 Difference]: Finished difference Result 644 states and 2241 transitions. [2022-03-15 19:44:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 19:44:21,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 19:44:21,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:21,466 INFO L225 Difference]: With dead ends: 644 [2022-03-15 19:44:21,466 INFO L226 Difference]: Without dead ends: 644 [2022-03-15 19:44:21,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-15 19:44:21,469 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:21,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 19 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:44:21,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-03-15 19:44:21,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 310. [2022-03-15 19:44:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.540453074433657) internal successors, (1094), 309 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:21,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1094 transitions. [2022-03-15 19:44:21,484 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1094 transitions. Word has length 23 [2022-03-15 19:44:21,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:21,484 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 1094 transitions. [2022-03-15 19:44:21,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1094 transitions. [2022-03-15 19:44:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 19:44:21,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:21,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:21,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:21,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-15 19:44:21,709 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:21,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:21,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1015320654, now seen corresponding path program 1 times [2022-03-15 19:44:21,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:21,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138689914] [2022-03-15 19:44:21,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:21,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 19:44:21,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:21,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138689914] [2022-03-15 19:44:21,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138689914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 19:44:21,787 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 19:44:21,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 19:44:21,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1068219700] [2022-03-15 19:44:21,787 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:21,790 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:21,818 INFO L252 McrAutomatonBuilder]: Finished intersection with 160 states and 387 transitions. [2022-03-15 19:44:21,818 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:22,697 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5405#(<= ~N~0 thread3Thread1of1ForFork2_~i~2)] [2022-03-15 19:44:22,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 19:44:22,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:22,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 19:44:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-15 19:44:22,698 INFO L87 Difference]: Start difference. First operand 310 states and 1094 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:22,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:22,843 INFO L93 Difference]: Finished difference Result 408 states and 1225 transitions. [2022-03-15 19:44:22,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 19:44:22,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 19:44:22,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:22,845 INFO L225 Difference]: With dead ends: 408 [2022-03-15 19:44:22,845 INFO L226 Difference]: Without dead ends: 208 [2022-03-15 19:44:22,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 19:44:22,846 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:22,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 21 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:44:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-15 19:44:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-03-15 19:44:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 3.4879227053140096) internal successors, (722), 207 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 722 transitions. [2022-03-15 19:44:22,853 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 722 transitions. Word has length 23 [2022-03-15 19:44:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:22,853 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 722 transitions. [2022-03-15 19:44:22,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 722 transitions. [2022-03-15 19:44:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 19:44:22,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:22,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:22,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 19:44:22,855 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:22,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1522616220, now seen corresponding path program 1 times [2022-03-15 19:44:22,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:22,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195278351] [2022-03-15 19:44:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:22,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:44:22,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:22,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195278351] [2022-03-15 19:44:22,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195278351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:22,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220024900] [2022-03-15 19:44:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:22,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:22,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:22,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:22,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 19:44:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:23,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 19:44:23,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:44:23,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:44:23,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220024900] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:23,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 19:44:23,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-03-15 19:44:23,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2050577656] [2022-03-15 19:44:23,128 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:23,133 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:23,164 INFO L252 McrAutomatonBuilder]: Finished intersection with 162 states and 389 transitions. [2022-03-15 19:44:23,164 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:24,045 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:44:24,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 19:44:24,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:24,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 19:44:24,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-15 19:44:24,046 INFO L87 Difference]: Start difference. First operand 208 states and 722 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:24,108 INFO L93 Difference]: Finished difference Result 254 states and 891 transitions. [2022-03-15 19:44:24,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 19:44:24,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 19:44:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:24,111 INFO L225 Difference]: With dead ends: 254 [2022-03-15 19:44:24,111 INFO L226 Difference]: Without dead ends: 254 [2022-03-15 19:44:24,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 167 SyntacticMatches, 14 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-15 19:44:24,112 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:24,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 7 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:44:24,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-15 19:44:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-03-15 19:44:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.5217391304347827) internal successors, (891), 253 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 891 transitions. [2022-03-15 19:44:24,121 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 891 transitions. Word has length 25 [2022-03-15 19:44:24,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:24,122 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 891 transitions. [2022-03-15 19:44:24,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 891 transitions. [2022-03-15 19:44:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 19:44:24,123 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:24,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:24,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:24,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:24,339 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:24,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:24,340 INFO L85 PathProgramCache]: Analyzing trace with hash 991180091, now seen corresponding path program 1 times [2022-03-15 19:44:24,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:24,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4796070] [2022-03-15 19:44:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:24,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:44:24,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:24,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4796070] [2022-03-15 19:44:24,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4796070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:24,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129144087] [2022-03-15 19:44:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:24,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:24,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:24,388 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:24,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 19:44:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:24,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 19:44:24,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:44:24,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 19:44:24,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129144087] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:24,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 19:44:24,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-03-15 19:44:24,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [22019272] [2022-03-15 19:44:24,607 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:24,611 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:24,638 INFO L252 McrAutomatonBuilder]: Finished intersection with 124 states and 258 transitions. [2022-03-15 19:44:24,638 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:25,218 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 19:44:25,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 19:44:25,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:25,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 19:44:25,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-15 19:44:25,219 INFO L87 Difference]: Start difference. First operand 254 states and 891 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:25,271 INFO L93 Difference]: Finished difference Result 316 states and 1120 transitions. [2022-03-15 19:44:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 19:44:25,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 19:44:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:25,273 INFO L225 Difference]: With dead ends: 316 [2022-03-15 19:44:25,273 INFO L226 Difference]: Without dead ends: 316 [2022-03-15 19:44:25,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 138 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-15 19:44:25,274 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:25,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 7 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 19:44:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-03-15 19:44:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2022-03-15 19:44:25,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.5555555555555554) internal successors, (1120), 315 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1120 transitions. [2022-03-15 19:44:25,284 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1120 transitions. Word has length 27 [2022-03-15 19:44:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:25,285 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 1120 transitions. [2022-03-15 19:44:25,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1120 transitions. [2022-03-15 19:44:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 19:44:25,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:25,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:25,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:25,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:25,511 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:25,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:25,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1867683509, now seen corresponding path program 1 times [2022-03-15 19:44:25,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:25,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537251987] [2022-03-15 19:44:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:25,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 19:44:25,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:25,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537251987] [2022-03-15 19:44:25,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537251987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:25,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92829416] [2022-03-15 19:44:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:25,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:25,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:25,607 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:25,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 19:44:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:25,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 19:44:25,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 19:44:25,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 19:44:25,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92829416] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:44:25,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:44:25,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-03-15 19:44:25,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1084181176] [2022-03-15 19:44:25,962 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:25,966 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:25,993 INFO L252 McrAutomatonBuilder]: Finished intersection with 118 states and 240 transitions. [2022-03-15 19:44:25,993 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:26,959 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [8440#(not (< 0 ~p~0)), 8443#(= thread2Thread1of1ForFork1_~i~1 0), 8400#(<= thread2Thread1of1ForFork1_~i~1 thread3Thread1of1ForFork2_~i~2), 8393#(not (< thread3Thread1of1ForFork2_~i~2 ~p~0)), 8442#(<= thread2Thread1of1ForFork1_~i~1 0), 8308#(<= 0 thread3Thread1of1ForFork2_~i~2), 8441#(= ~p~0 0)] [2022-03-15 19:44:26,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 19:44:26,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:26,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 19:44:26,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-15 19:44:26,960 INFO L87 Difference]: Start difference. First operand 316 states and 1120 transitions. Second operand has 13 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:27,314 INFO L93 Difference]: Finished difference Result 784 states and 2684 transitions. [2022-03-15 19:44:27,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 19:44:27,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 19:44:27,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:27,319 INFO L225 Difference]: With dead ends: 784 [2022-03-15 19:44:27,319 INFO L226 Difference]: Without dead ends: 526 [2022-03-15 19:44:27,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 113 SyntacticMatches, 30 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2022-03-15 19:44:27,320 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 142 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:27,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 50 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 19:44:27,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-03-15 19:44:27,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 340. [2022-03-15 19:44:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.327433628318584) internal successors, (1128), 339 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1128 transitions. [2022-03-15 19:44:27,331 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1128 transitions. Word has length 28 [2022-03-15 19:44:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:27,332 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1128 transitions. [2022-03-15 19:44:27,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1128 transitions. [2022-03-15 19:44:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 19:44:27,333 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:27,333 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:27,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:27,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:27,550 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:27,550 INFO L85 PathProgramCache]: Analyzing trace with hash -411555564, now seen corresponding path program 2 times [2022-03-15 19:44:27,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:27,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656986187] [2022-03-15 19:44:27,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:27,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 19:44:27,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:27,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656986187] [2022-03-15 19:44:27,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656986187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:27,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687776566] [2022-03-15 19:44:27,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:44:27,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:27,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:27,610 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:27,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 19:44:27,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:44:27,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:44:27,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 19:44:27,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 19:44:27,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 19:44:27,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687776566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:44:27,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:44:27,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-15 19:44:27,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1366259704] [2022-03-15 19:44:27,871 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:27,875 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:27,914 INFO L252 McrAutomatonBuilder]: Finished intersection with 126 states and 256 transitions. [2022-03-15 19:44:27,914 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:28,578 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [10120#(< thread2Thread1of1ForFork1_~i~1 ~N~0), 10123#(or (< (+ 2 thread2Thread1of1ForFork1_~i~1) ~N~0) (<= ~N~0 (+ thread2Thread1of1ForFork1_~i~1 1))), 10124#(or (<= ~N~0 1) (< 2 ~N~0)), 10122#(or (< (+ thread2Thread1of1ForFork1_~i~1 1) ~N~0) (<= ~N~0 thread2Thread1of1ForFork1_~i~1)), 10121#(< (+ thread2Thread1of1ForFork1_~i~1 1) ~N~0)] [2022-03-15 19:44:28,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 19:44:28,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:28,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 19:44:28,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-03-15 19:44:28,580 INFO L87 Difference]: Start difference. First operand 340 states and 1128 transitions. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:28,818 INFO L93 Difference]: Finished difference Result 465 states and 1492 transitions. [2022-03-15 19:44:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 19:44:28,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 19:44:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:28,821 INFO L225 Difference]: With dead ends: 465 [2022-03-15 19:44:28,821 INFO L226 Difference]: Without dead ends: 342 [2022-03-15 19:44:28,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2022-03-15 19:44:28,822 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 112 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:28,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 52 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:44:28,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-03-15 19:44:28,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-03-15 19:44:28,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.313782991202346) internal successors, (1130), 341 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1130 transitions. [2022-03-15 19:44:28,831 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1130 transitions. Word has length 30 [2022-03-15 19:44:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:28,831 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1130 transitions. [2022-03-15 19:44:28,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1130 transitions. [2022-03-15 19:44:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 19:44:28,832 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:28,833 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:28,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:29,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:29,052 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:29,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1860144058, now seen corresponding path program 3 times [2022-03-15 19:44:29,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:29,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881843502] [2022-03-15 19:44:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:29,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-15 19:44:29,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:29,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881843502] [2022-03-15 19:44:29,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881843502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:29,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71043125] [2022-03-15 19:44:29,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:44:29,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:29,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:29,121 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:29,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 19:44:29,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 19:44:29,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:44:29,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 19:44:29,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-15 19:44:29,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-15 19:44:29,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71043125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:44:29,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:44:29,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-15 19:44:29,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1307730752] [2022-03-15 19:44:29,437 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:29,442 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:29,502 INFO L252 McrAutomatonBuilder]: Finished intersection with 128 states and 258 transitions. [2022-03-15 19:44:29,503 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:30,339 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [11486#(or (<= ~N~0 0) (<= 2 ~N~0)), 11485#(or (<= ~N~0 thread1Thread1of1ForFork0_~i~0) (<= (+ 2 thread1Thread1of1ForFork0_~i~0) ~N~0))] [2022-03-15 19:44:30,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 19:44:30,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:30,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 19:44:30,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-15 19:44:30,340 INFO L87 Difference]: Start difference. First operand 342 states and 1130 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:30,502 INFO L93 Difference]: Finished difference Result 410 states and 1365 transitions. [2022-03-15 19:44:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 19:44:30,503 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 19:44:30,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:30,506 INFO L225 Difference]: With dead ends: 410 [2022-03-15 19:44:30,506 INFO L226 Difference]: Without dead ends: 410 [2022-03-15 19:44:30,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 139 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-03-15 19:44:30,506 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 107 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:30,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 18 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:44:30,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-03-15 19:44:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2022-03-15 19:44:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.337408312958435) internal successors, (1365), 409 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1365 transitions. [2022-03-15 19:44:30,517 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1365 transitions. Word has length 32 [2022-03-15 19:44:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:30,517 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1365 transitions. [2022-03-15 19:44:30,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:30,518 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1365 transitions. [2022-03-15 19:44:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 19:44:30,519 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:30,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:30,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:30,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:30,740 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:30,740 INFO L85 PathProgramCache]: Analyzing trace with hash -64418912, now seen corresponding path program 4 times [2022-03-15 19:44:30,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:30,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570270373] [2022-03-15 19:44:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:30,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-15 19:44:30,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:30,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570270373] [2022-03-15 19:44:30,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570270373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:30,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863975340] [2022-03-15 19:44:30,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 19:44:30,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:30,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:30,805 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:30,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 19:44:30,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 19:44:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:44:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 19:44:30,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 19:44:31,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 19:44:31,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863975340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:44:31,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:44:31,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-15 19:44:31,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [947009256] [2022-03-15 19:44:31,107 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:31,115 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:31,156 INFO L252 McrAutomatonBuilder]: Finished intersection with 140 states and 286 transitions. [2022-03-15 19:44:31,156 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:32,425 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [12935#(or (<= ~N~0 0) (<= 2 ~N~0)), 12934#(and (or (<= ~N~0 thread3Thread1of1ForFork2_~i~2) (<= 2 ~N~0)) (or (= thread3Thread1of1ForFork2_~i~2 0) (<= ~N~0 thread3Thread1of1ForFork2_~i~2)))] [2022-03-15 19:44:32,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 19:44:32,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:32,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 19:44:32,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-03-15 19:44:32,426 INFO L87 Difference]: Start difference. First operand 410 states and 1365 transitions. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:32,608 INFO L93 Difference]: Finished difference Result 548 states and 1876 transitions. [2022-03-15 19:44:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 19:44:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 19:44:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:32,612 INFO L225 Difference]: With dead ends: 548 [2022-03-15 19:44:32,612 INFO L226 Difference]: Without dead ends: 548 [2022-03-15 19:44:32,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 150 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-15 19:44:32,613 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:32,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 20 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:44:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-03-15 19:44:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 510. [2022-03-15 19:44:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 3.388998035363458) internal successors, (1725), 509 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1725 transitions. [2022-03-15 19:44:32,629 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1725 transitions. Word has length 33 [2022-03-15 19:44:32,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:32,629 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 1725 transitions. [2022-03-15 19:44:32,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1725 transitions. [2022-03-15 19:44:32,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 19:44:32,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:32,632 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:32,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:32,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-15 19:44:32,839 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:32,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:32,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1828066644, now seen corresponding path program 5 times [2022-03-15 19:44:32,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:32,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272229998] [2022-03-15 19:44:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:32,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 19:44:32,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:32,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272229998] [2022-03-15 19:44:32,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272229998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:32,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221818428] [2022-03-15 19:44:32,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 19:44:32,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:32,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:32,954 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:32,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 19:44:33,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 19:44:33,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:44:33,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 19:44:33,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 19:44:33,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 19:44:33,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221818428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:44:33,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:44:33,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 19:44:33,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1433358121] [2022-03-15 19:44:33,308 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:33,315 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:33,370 INFO L252 McrAutomatonBuilder]: Finished intersection with 172 states and 360 transitions. [2022-03-15 19:44:33,370 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:34,873 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [14735#(<= ~p~0 1), 14736#(<= thread2Thread1of1ForFork1_~i~1 1), 14738#(<= thread2Thread1of1ForFork1_~i~1 0), 14739#(= thread2Thread1of1ForFork1_~i~1 0), 14737#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0))] [2022-03-15 19:44:34,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 19:44:34,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:34,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 19:44:34,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-15 19:44:34,875 INFO L87 Difference]: Start difference. First operand 510 states and 1725 transitions. Second operand has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:35,341 INFO L93 Difference]: Finished difference Result 1014 states and 3453 transitions. [2022-03-15 19:44:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 19:44:35,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 19:44:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:35,346 INFO L225 Difference]: With dead ends: 1014 [2022-03-15 19:44:35,347 INFO L226 Difference]: Without dead ends: 858 [2022-03-15 19:44:35,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 188 SyntacticMatches, 17 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 19:44:35,348 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:35,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 68 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 19:44:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-03-15 19:44:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 626. [2022-03-15 19:44:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.4192) internal successors, (2137), 625 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 2137 transitions. [2022-03-15 19:44:35,366 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 2137 transitions. Word has length 35 [2022-03-15 19:44:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:35,366 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 2137 transitions. [2022-03-15 19:44:35,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 2137 transitions. [2022-03-15 19:44:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 19:44:35,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:35,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:35,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:35,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:35,595 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:35,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:35,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1740043523, now seen corresponding path program 6 times [2022-03-15 19:44:35,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:35,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426050044] [2022-03-15 19:44:35,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:35,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-15 19:44:35,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:35,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426050044] [2022-03-15 19:44:35,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426050044] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:35,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038483468] [2022-03-15 19:44:35,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 19:44:35,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:35,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:35,694 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:35,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 19:44:35,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 19:44:35,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:44:35,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 19:44:35,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-15 19:44:35,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-15 19:44:36,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038483468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:44:36,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:44:36,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 19:44:36,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1858366458] [2022-03-15 19:44:36,033 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:36,040 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:36,109 INFO L252 McrAutomatonBuilder]: Finished intersection with 180 states and 376 transitions. [2022-03-15 19:44:36,109 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:37,003 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [17282#(or (< (+ thread2Thread1of1ForFork1_~i~1 1) ~N~0) (<= ~N~0 thread2Thread1of1ForFork1_~i~1)), 17280#(< thread2Thread1of1ForFork1_~i~1 ~N~0), 17281#(< (+ thread2Thread1of1ForFork1_~i~1 1) ~N~0), 17283#(or (< (+ 2 thread2Thread1of1ForFork1_~i~1) ~N~0) (<= ~N~0 (+ thread2Thread1of1ForFork1_~i~1 1))), 17285#(or (< 3 ~N~0) (<= ~N~0 2)), 17284#(or (< (+ 3 thread2Thread1of1ForFork1_~i~1) ~N~0) (<= ~N~0 (+ 2 thread2Thread1of1ForFork1_~i~1)))] [2022-03-15 19:44:37,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 19:44:37,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:37,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 19:44:37,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-03-15 19:44:37,004 INFO L87 Difference]: Start difference. First operand 626 states and 2137 transitions. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:37,303 INFO L93 Difference]: Finished difference Result 882 states and 2903 transitions. [2022-03-15 19:44:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 19:44:37,304 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 19:44:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:37,308 INFO L225 Difference]: With dead ends: 882 [2022-03-15 19:44:37,308 INFO L226 Difference]: Without dead ends: 628 [2022-03-15 19:44:37,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 19:44:37,309 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 123 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:37,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 89 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:44:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-03-15 19:44:37,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2022-03-15 19:44:37,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.411483253588517) internal successors, (2139), 627 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2139 transitions. [2022-03-15 19:44:37,325 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2139 transitions. Word has length 37 [2022-03-15 19:44:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:37,325 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 2139 transitions. [2022-03-15 19:44:37,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2139 transitions. [2022-03-15 19:44:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 19:44:37,327 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:37,327 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:37,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:37,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 19:44:37,547 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:37,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:37,548 INFO L85 PathProgramCache]: Analyzing trace with hash 656589493, now seen corresponding path program 7 times [2022-03-15 19:44:37,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:37,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229581339] [2022-03-15 19:44:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:37,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-15 19:44:37,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:37,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229581339] [2022-03-15 19:44:37,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229581339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:37,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806510251] [2022-03-15 19:44:37,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 19:44:37,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:37,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:37,653 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:37,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 19:44:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:37,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 19:44:37,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-15 19:44:37,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-15 19:44:38,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806510251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:44:38,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:44:38,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 19:44:38,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1877520767] [2022-03-15 19:44:38,002 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:38,009 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:38,097 INFO L252 McrAutomatonBuilder]: Finished intersection with 182 states and 378 transitions. [2022-03-15 19:44:38,098 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:39,276 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [19688#(or (<= ~N~0 (+ thread1Thread1of1ForFork0_~i~0 1)) (<= (+ 3 thread1Thread1of1ForFork0_~i~0) ~N~0)), 19687#(or (<= ~N~0 thread1Thread1of1ForFork0_~i~0) (<= (+ 2 thread1Thread1of1ForFork0_~i~0) ~N~0)), 19689#(or (<= ~N~0 1) (<= 3 ~N~0))] [2022-03-15 19:44:39,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 19:44:39,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:39,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 19:44:39,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-15 19:44:39,277 INFO L87 Difference]: Start difference. First operand 628 states and 2139 transitions. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 11 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:39,469 INFO L93 Difference]: Finished difference Result 732 states and 2506 transitions. [2022-03-15 19:44:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 19:44:39,470 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 11 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 19:44:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:39,473 INFO L225 Difference]: With dead ends: 732 [2022-03-15 19:44:39,473 INFO L226 Difference]: Without dead ends: 732 [2022-03-15 19:44:39,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 193 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2022-03-15 19:44:39,474 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 153 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:39,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 24 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:44:39,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-03-15 19:44:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2022-03-15 19:44:39,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.4281805745554035) internal successors, (2506), 731 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2506 transitions. [2022-03-15 19:44:39,492 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2506 transitions. Word has length 39 [2022-03-15 19:44:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:39,492 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2506 transitions. [2022-03-15 19:44:39,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 11 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2506 transitions. [2022-03-15 19:44:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-15 19:44:39,494 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:39,494 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:39,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:39,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 19:44:39,717 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:39,718 INFO L85 PathProgramCache]: Analyzing trace with hash 517015081, now seen corresponding path program 8 times [2022-03-15 19:44:39,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:39,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323740592] [2022-03-15 19:44:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:39,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-15 19:44:39,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:39,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323740592] [2022-03-15 19:44:39,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323740592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:39,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73761203] [2022-03-15 19:44:39,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:44:39,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:39,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:39,795 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:39,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 19:44:39,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:44:39,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:44:39,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 19:44:39,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-15 19:44:40,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-15 19:44:40,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73761203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:44:40,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:44:40,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 19:44:40,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1659348442] [2022-03-15 19:44:40,165 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:40,172 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:40,240 INFO L252 McrAutomatonBuilder]: Finished intersection with 198 states and 416 transitions. [2022-03-15 19:44:40,241 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:42,073 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [22153#(and (or (<= ~N~0 thread3Thread1of1ForFork2_~i~2) (<= 3 ~N~0)) (or (= thread3Thread1of1ForFork2_~i~2 0) (<= ~N~0 thread3Thread1of1ForFork2_~i~2))), 22154#(or (<= ~N~0 0) (<= 3 ~N~0))] [2022-03-15 19:44:42,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 19:44:42,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:42,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 19:44:42,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2022-03-15 19:44:42,074 INFO L87 Difference]: Start difference. First operand 732 states and 2506 transitions. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:42,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:42,252 INFO L93 Difference]: Finished difference Result 892 states and 3102 transitions. [2022-03-15 19:44:42,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 19:44:42,252 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-15 19:44:42,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:42,257 INFO L225 Difference]: With dead ends: 892 [2022-03-15 19:44:42,257 INFO L226 Difference]: Without dead ends: 892 [2022-03-15 19:44:42,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 210 SyntacticMatches, 14 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-03-15 19:44:42,258 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 78 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:42,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:44:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-03-15 19:44:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 848. [2022-03-15 19:44:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.4545454545454546) internal successors, (2926), 847 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2926 transitions. [2022-03-15 19:44:42,277 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2926 transitions. Word has length 40 [2022-03-15 19:44:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:42,277 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 2926 transitions. [2022-03-15 19:44:42,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2926 transitions. [2022-03-15 19:44:42,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 19:44:42,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:42,280 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:42,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:42,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 19:44:42,495 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:42,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:42,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1415747851, now seen corresponding path program 9 times [2022-03-15 19:44:42,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:42,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596537263] [2022-03-15 19:44:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:42,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-15 19:44:42,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:42,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596537263] [2022-03-15 19:44:42,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596537263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:42,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568930903] [2022-03-15 19:44:42,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:44:42,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:42,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:42,635 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:42,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 19:44:42,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 19:44:42,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:44:42,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:44:42,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-15 19:44:42,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-15 19:44:43,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568930903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:44:43,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:44:43,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2022-03-15 19:44:43,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [168584453] [2022-03-15 19:44:43,096 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:43,103 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:43,211 INFO L252 McrAutomatonBuilder]: Finished intersection with 234 states and 500 transitions. [2022-03-15 19:44:43,211 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:45,262 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [25019#(<= ~p~0 2), 25022#(<= thread2Thread1of1ForFork1_~i~1 0), 25020#(<= thread2Thread1of1ForFork1_~i~1 2), 25023#(= thread2Thread1of1ForFork1_~i~1 0), 25018#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 25021#(<= thread2Thread1of1ForFork1_~i~1 1)] [2022-03-15 19:44:45,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 19:44:45,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:45,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 19:44:45,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-03-15 19:44:45,263 INFO L87 Difference]: Start difference. First operand 848 states and 2926 transitions. Second operand has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:45,795 INFO L93 Difference]: Finished difference Result 2072 states and 7324 transitions. [2022-03-15 19:44:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 19:44:45,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-15 19:44:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:45,803 INFO L225 Difference]: With dead ends: 2072 [2022-03-15 19:44:45,803 INFO L226 Difference]: Without dead ends: 1860 [2022-03-15 19:44:45,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 269 SyntacticMatches, 18 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 19:44:45,804 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 208 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:45,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 57 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 19:44:45,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-03-15 19:44:45,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1040. [2022-03-15 19:44:45,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.4937439846005773) internal successors, (3630), 1039 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3630 transitions. [2022-03-15 19:44:45,834 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3630 transitions. Word has length 42 [2022-03-15 19:44:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:45,834 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 3630 transitions. [2022-03-15 19:44:45,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 16 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3630 transitions. [2022-03-15 19:44:45,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 19:44:45,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:45,837 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:45,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:46,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-15 19:44:46,061 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:46,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:46,061 INFO L85 PathProgramCache]: Analyzing trace with hash 309014367, now seen corresponding path program 10 times [2022-03-15 19:44:46,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:46,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648504318] [2022-03-15 19:44:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:46,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-15 19:44:46,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:46,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648504318] [2022-03-15 19:44:46,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648504318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:46,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520269704] [2022-03-15 19:44:46,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 19:44:46,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:46,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:46,199 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:46,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 19:44:46,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 19:44:46,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:44:46,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:44:46,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-15 19:44:46,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-15 19:44:46,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520269704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:44:46,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:44:46,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2022-03-15 19:44:46,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [16556150] [2022-03-15 19:44:46,653 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:46,662 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:46,771 INFO L252 McrAutomatonBuilder]: Finished intersection with 216 states and 451 transitions. [2022-03-15 19:44:46,771 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:48,540 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [29511#(= thread2Thread1of1ForFork1_~i~1 0), 29507#(<= thread2Thread1of1ForFork1_~i~1 2), 29510#(or (<= ~p~0 (+ 2 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 29509#(<= thread2Thread1of1ForFork1_~i~1 0), 29508#(<= thread2Thread1of1ForFork1_~i~1 1), 29506#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0))] [2022-03-15 19:44:48,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 19:44:48,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:48,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 19:44:48,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-15 19:44:48,541 INFO L87 Difference]: Start difference. First operand 1040 states and 3630 transitions. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:49,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:49,046 INFO L93 Difference]: Finished difference Result 1898 states and 6766 transitions. [2022-03-15 19:44:49,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 19:44:49,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-15 19:44:49,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:49,057 INFO L225 Difference]: With dead ends: 1898 [2022-03-15 19:44:49,057 INFO L226 Difference]: Without dead ends: 1746 [2022-03-15 19:44:49,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 242 SyntacticMatches, 18 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 19:44:49,058 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 151 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:49,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 69 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 19:44:49,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-03-15 19:44:49,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1068. [2022-03-15 19:44:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 3.49203373945642) internal successors, (3726), 1067 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 3726 transitions. [2022-03-15 19:44:49,121 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 3726 transitions. Word has length 42 [2022-03-15 19:44:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:49,121 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 3726 transitions. [2022-03-15 19:44:49,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 3726 transitions. [2022-03-15 19:44:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 19:44:49,124 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:49,124 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:49,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:49,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:49,339 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:49,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:49,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1435422850, now seen corresponding path program 11 times [2022-03-15 19:44:49,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:49,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018343465] [2022-03-15 19:44:49,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:49,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-15 19:44:49,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:49,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018343465] [2022-03-15 19:44:49,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018343465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:49,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361012319] [2022-03-15 19:44:49,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 19:44:49,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:49,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:49,436 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:49,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 19:44:49,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 19:44:49,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:44:49,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 19:44:49,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-15 19:44:49,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-15 19:44:49,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361012319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:44:49,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:44:49,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-15 19:44:49,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [331736411] [2022-03-15 19:44:49,874 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:49,885 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:50,004 INFO L252 McrAutomatonBuilder]: Finished intersection with 242 states and 516 transitions. [2022-03-15 19:44:50,004 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:51,293 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [33874#(or (< (+ 3 thread2Thread1of1ForFork1_~i~1) ~N~0) (<= ~N~0 (+ 2 thread2Thread1of1ForFork1_~i~1))), 33872#(or (< (+ thread2Thread1of1ForFork1_~i~1 1) ~N~0) (<= ~N~0 thread2Thread1of1ForFork1_~i~1)), 33875#(or (< (+ thread2Thread1of1ForFork1_~i~1 4) ~N~0) (<= ~N~0 (+ 3 thread2Thread1of1ForFork1_~i~1))), 33876#(or (< 4 ~N~0) (<= ~N~0 3)), 33873#(or (< (+ 2 thread2Thread1of1ForFork1_~i~1) ~N~0) (<= ~N~0 (+ thread2Thread1of1ForFork1_~i~1 1))), 33870#(< thread2Thread1of1ForFork1_~i~1 ~N~0), 33871#(< (+ thread2Thread1of1ForFork1_~i~1 1) ~N~0)] [2022-03-15 19:44:51,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 19:44:51,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:51,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 19:44:51,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-03-15 19:44:51,294 INFO L87 Difference]: Start difference. First operand 1068 states and 3726 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 17 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:51,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:51,750 INFO L93 Difference]: Finished difference Result 1575 states and 5324 transitions. [2022-03-15 19:44:51,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 19:44:51,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 17 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 19:44:51,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:51,755 INFO L225 Difference]: With dead ends: 1575 [2022-03-15 19:44:51,755 INFO L226 Difference]: Without dead ends: 1070 [2022-03-15 19:44:51,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=1492, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 19:44:51,756 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 149 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:51,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 140 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 19:44:51,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-03-15 19:44:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1070. [2022-03-15 19:44:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.4873713751169317) internal successors, (3728), 1069 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3728 transitions. [2022-03-15 19:44:51,778 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3728 transitions. Word has length 44 [2022-03-15 19:44:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:51,778 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 3728 transitions. [2022-03-15 19:44:51,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 17 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3728 transitions. [2022-03-15 19:44:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-15 19:44:51,781 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:51,781 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:51,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:51,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 19:44:51,996 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:51,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:51,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1646149552, now seen corresponding path program 12 times [2022-03-15 19:44:51,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:51,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900694049] [2022-03-15 19:44:51,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:51,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-15 19:44:52,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:52,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900694049] [2022-03-15 19:44:52,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900694049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:52,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841393773] [2022-03-15 19:44:52,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 19:44:52,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:52,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:52,106 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:52,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 19:44:52,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 19:44:52,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:44:52,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 19:44:52,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-15 19:44:52,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-15 19:44:53,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841393773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:44:53,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:44:53,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 19:44:53,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1399256721] [2022-03-15 19:44:53,014 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:53,024 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:53,175 INFO L252 McrAutomatonBuilder]: Finished intersection with 244 states and 518 transitions. [2022-03-15 19:44:53,176 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:55,092 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [37911#(or (<= ~N~0 thread1Thread1of1ForFork0_~i~0) (<= (+ 2 thread1Thread1of1ForFork0_~i~0) ~N~0)), 37912#(or (<= ~N~0 (+ thread1Thread1of1ForFork0_~i~0 1)) (<= (+ 3 thread1Thread1of1ForFork0_~i~0) ~N~0)), 37914#(or (<= 4 ~N~0) (<= ~N~0 2)), 37913#(or (<= (+ thread1Thread1of1ForFork0_~i~0 4) ~N~0) (<= ~N~0 (+ 2 thread1Thread1of1ForFork0_~i~0)))] [2022-03-15 19:44:55,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 19:44:55,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:55,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 19:44:55,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-03-15 19:44:55,093 INFO L87 Difference]: Start difference. First operand 1070 states and 3728 transitions. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:55,357 INFO L93 Difference]: Finished difference Result 1222 states and 4273 transitions. [2022-03-15 19:44:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 19:44:55,357 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-03-15 19:44:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:55,364 INFO L225 Difference]: With dead ends: 1222 [2022-03-15 19:44:55,364 INFO L226 Difference]: Without dead ends: 1222 [2022-03-15 19:44:55,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 251 SyntacticMatches, 17 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=1251, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 19:44:55,365 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 248 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:55,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 30 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:44:55,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2022-03-15 19:44:55,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1222. [2022-03-15 19:44:55,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.4995904995904996) internal successors, (4273), 1221 states have internal predecessors, (4273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4273 transitions. [2022-03-15 19:44:55,391 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4273 transitions. Word has length 46 [2022-03-15 19:44:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:55,391 INFO L470 AbstractCegarLoop]: Abstraction has 1222 states and 4273 transitions. [2022-03-15 19:44:55,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4273 transitions. [2022-03-15 19:44:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-15 19:44:55,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:55,394 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:55,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 19:44:55,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:55,618 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:55,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:55,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1519174234, now seen corresponding path program 13 times [2022-03-15 19:44:55,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:55,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240797544] [2022-03-15 19:44:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:55,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-15 19:44:55,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:55,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240797544] [2022-03-15 19:44:55,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240797544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:55,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790473424] [2022-03-15 19:44:55,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 19:44:55,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:55,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:55,760 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:55,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 19:44:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:55,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 19:44:55,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-15 19:44:56,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:44:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-15 19:44:56,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790473424] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:44:56,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:44:56,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 19:44:56,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1489894429] [2022-03-15 19:44:56,229 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:44:56,237 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:44:56,379 INFO L252 McrAutomatonBuilder]: Finished intersection with 264 states and 566 transitions. [2022-03-15 19:44:56,379 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:44:58,849 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [41899#(and (or (<= 4 ~N~0) (<= ~N~0 thread3Thread1of1ForFork2_~i~2)) (or (= thread3Thread1of1ForFork2_~i~2 0) (<= ~N~0 thread3Thread1of1ForFork2_~i~2))), 41900#(or (<= 4 ~N~0) (<= ~N~0 0))] [2022-03-15 19:44:58,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 19:44:58,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:44:58,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 19:44:58,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-03-15 19:44:58,850 INFO L87 Difference]: Start difference. First operand 1222 states and 4273 transitions. Second operand has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:44:59,065 INFO L93 Difference]: Finished difference Result 1404 states and 4954 transitions. [2022-03-15 19:44:59,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 19:44:59,065 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-15 19:44:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:44:59,078 INFO L225 Difference]: With dead ends: 1404 [2022-03-15 19:44:59,078 INFO L226 Difference]: Without dead ends: 1404 [2022-03-15 19:44:59,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 278 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 19:44:59,079 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 122 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 19:44:59,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 21 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 19:44:59,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-03-15 19:44:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1354. [2022-03-15 19:44:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 3.512934220251293) internal successors, (4753), 1353 states have internal predecessors, (4753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 4753 transitions. [2022-03-15 19:44:59,113 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 4753 transitions. Word has length 47 [2022-03-15 19:44:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:44:59,114 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 4753 transitions. [2022-03-15 19:44:59,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:44:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 4753 transitions. [2022-03-15 19:44:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-15 19:44:59,117 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:44:59,117 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:44:59,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-15 19:44:59,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:59,323 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:44:59,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:44:59,324 INFO L85 PathProgramCache]: Analyzing trace with hash 311407410, now seen corresponding path program 14 times [2022-03-15 19:44:59,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:44:59,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751279510] [2022-03-15 19:44:59,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:44:59,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:44:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:44:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-15 19:44:59,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:44:59,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751279510] [2022-03-15 19:44:59,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751279510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:44:59,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861752304] [2022-03-15 19:44:59,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:44:59,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:44:59,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:44:59,497 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:44:59,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 19:44:59,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:44:59,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:44:59,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 19:44:59,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:44:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-15 19:44:59,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:45:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-15 19:45:00,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861752304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:45:00,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:45:00,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 19:45:00,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [550051952] [2022-03-15 19:45:00,020 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:45:00,036 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:45:00,276 INFO L252 McrAutomatonBuilder]: Finished intersection with 304 states and 660 transitions. [2022-03-15 19:45:00,276 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:45:03,021 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [46352#(<= thread2Thread1of1ForFork1_~i~1 0), 46348#(<= thread2Thread1of1ForFork1_~i~1 3), 46349#(<= thread2Thread1of1ForFork1_~i~1 2), 46350#(<= thread2Thread1of1ForFork1_~i~1 1), 46353#(= thread2Thread1of1ForFork1_~i~1 0), 46351#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 46347#(<= ~p~0 3)] [2022-03-15 19:45:03,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 19:45:03,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:45:03,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 19:45:03,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 19:45:03,023 INFO L87 Difference]: Start difference. First operand 1354 states and 4753 transitions. Second operand has 19 states, 19 states have (on average 7.157894736842105) internal successors, (136), 19 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:03,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:45:03,865 INFO L93 Difference]: Finished difference Result 3464 states and 12515 transitions. [2022-03-15 19:45:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 19:45:03,865 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.157894736842105) internal successors, (136), 19 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-03-15 19:45:03,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:45:03,878 INFO L225 Difference]: With dead ends: 3464 [2022-03-15 19:45:03,878 INFO L226 Difference]: Without dead ends: 3188 [2022-03-15 19:45:03,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 342 SyntacticMatches, 21 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=889, Invalid=3803, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 19:45:03,882 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 316 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 19:45:03,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 72 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 19:45:03,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3188 states. [2022-03-15 19:45:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3188 to 1638. [2022-03-15 19:45:03,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.551007941356139) internal successors, (5813), 1637 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:03,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5813 transitions. [2022-03-15 19:45:03,945 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5813 transitions. Word has length 49 [2022-03-15 19:45:03,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:45:03,946 INFO L470 AbstractCegarLoop]: Abstraction has 1638 states and 5813 transitions. [2022-03-15 19:45:03,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.157894736842105) internal successors, (136), 19 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5813 transitions. [2022-03-15 19:45:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-15 19:45:03,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:45:03,951 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:45:03,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 19:45:04,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:04,165 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:45:04,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:45:04,165 INFO L85 PathProgramCache]: Analyzing trace with hash 526541978, now seen corresponding path program 15 times [2022-03-15 19:45:04,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:45:04,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410143786] [2022-03-15 19:45:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:45:04,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:45:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-15 19:45:04,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:45:04,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410143786] [2022-03-15 19:45:04,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410143786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:45:04,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269926191] [2022-03-15 19:45:04,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:45:04,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:04,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:45:04,300 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:45:04,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 19:45:04,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 19:45:04,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:45:04,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:45:04,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:45:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-15 19:45:04,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:45:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-15 19:45:04,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269926191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:45:04,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:45:04,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 17 [2022-03-15 19:45:04,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1847511178] [2022-03-15 19:45:04,770 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:45:04,779 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:45:05,019 INFO L252 McrAutomatonBuilder]: Finished intersection with 284 states and 605 transitions. [2022-03-15 19:45:05,019 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:45:07,551 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [53503#(<= thread2Thread1of1ForFork1_~i~1 3), 53502#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 53505#(<= thread2Thread1of1ForFork1_~i~1 1), 53504#(<= thread2Thread1of1ForFork1_~i~1 2), 53501#(or (<= ~p~0 (+ 3 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 53507#(= thread2Thread1of1ForFork1_~i~1 0), 53506#(<= thread2Thread1of1ForFork1_~i~1 0)] [2022-03-15 19:45:07,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 19:45:07,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:45:07,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 19:45:07,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-03-15 19:45:07,553 INFO L87 Difference]: Start difference. First operand 1638 states and 5813 transitions. Second operand has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:45:08,239 INFO L93 Difference]: Finished difference Result 3630 states and 13237 transitions. [2022-03-15 19:45:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 19:45:08,239 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-03-15 19:45:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:45:08,253 INFO L225 Difference]: With dead ends: 3630 [2022-03-15 19:45:08,254 INFO L226 Difference]: Without dead ends: 3422 [2022-03-15 19:45:08,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 324 SyntacticMatches, 21 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1852, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 19:45:08,255 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 292 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 19:45:08,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 71 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 19:45:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2022-03-15 19:45:08,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2016. [2022-03-15 19:45:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 3.5861042183622827) internal successors, (7226), 2015 states have internal predecessors, (7226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 7226 transitions. [2022-03-15 19:45:08,308 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 7226 transitions. Word has length 49 [2022-03-15 19:45:08,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:45:08,308 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 7226 transitions. [2022-03-15 19:45:08,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.0) internal successors, (133), 19 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:08,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 7226 transitions. [2022-03-15 19:45:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-15 19:45:08,312 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:45:08,312 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:45:08,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 19:45:08,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:08,519 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:45:08,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:45:08,520 INFO L85 PathProgramCache]: Analyzing trace with hash 264881114, now seen corresponding path program 16 times [2022-03-15 19:45:08,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:45:08,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895966452] [2022-03-15 19:45:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:45:08,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:45:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-15 19:45:08,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:45:08,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895966452] [2022-03-15 19:45:08,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895966452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:45:08,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055459282] [2022-03-15 19:45:08,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 19:45:08,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:08,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:45:08,656 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:45:08,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 19:45:09,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 19:45:09,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:45:09,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 19:45:09,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:45:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-15 19:45:09,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:45:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-15 19:45:09,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055459282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:45:09,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:45:09,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 25 [2022-03-15 19:45:09,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [697245954] [2022-03-15 19:45:09,338 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:45:09,345 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:45:09,473 INFO L252 McrAutomatonBuilder]: Finished intersection with 262 states and 545 transitions. [2022-03-15 19:45:09,474 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:45:11,674 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [61561#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 61559#(<= thread2Thread1of1ForFork1_~i~1 2), 61558#(<= thread2Thread1of1ForFork1_~i~1 3), 61562#(<= thread2Thread1of1ForFork1_~i~1 0), 61564#(= thread2Thread1of1ForFork1_~i~1 0), 61560#(<= thread2Thread1of1ForFork1_~i~1 1), 61563#(or (<= ~p~0 (+ 2 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0))] [2022-03-15 19:45:11,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 19:45:11,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:45:11,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 19:45:11,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2022-03-15 19:45:11,675 INFO L87 Difference]: Start difference. First operand 2016 states and 7226 transitions. Second operand has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:12,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:45:12,486 INFO L93 Difference]: Finished difference Result 4802 states and 17385 transitions. [2022-03-15 19:45:12,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 19:45:12,487 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-03-15 19:45:12,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:45:12,502 INFO L225 Difference]: With dead ends: 4802 [2022-03-15 19:45:12,502 INFO L226 Difference]: Without dead ends: 4336 [2022-03-15 19:45:12,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 296 SyntacticMatches, 21 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=680, Invalid=2742, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 19:45:12,504 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 267 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:45:12,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 107 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:45:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2022-03-15 19:45:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 2258. [2022-03-15 19:45:12,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2258 states, 2257 states have (on average 3.6902968542312804) internal successors, (8329), 2257 states have internal predecessors, (8329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:12,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 8329 transitions. [2022-03-15 19:45:12,567 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 8329 transitions. Word has length 49 [2022-03-15 19:45:12,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:45:12,567 INFO L470 AbstractCegarLoop]: Abstraction has 2258 states and 8329 transitions. [2022-03-15 19:45:12,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:12,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 8329 transitions. [2022-03-15 19:45:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-15 19:45:12,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:45:12,572 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:45:12,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 19:45:12,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-15 19:45:12,787 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:45:12,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:45:12,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2102499366, now seen corresponding path program 17 times [2022-03-15 19:45:12,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:45:12,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478201493] [2022-03-15 19:45:12,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:45:12,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:45:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-15 19:45:12,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:45:12,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478201493] [2022-03-15 19:45:12,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478201493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:45:12,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613563852] [2022-03-15 19:45:12,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 19:45:12,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:12,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:45:12,914 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:45:12,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 19:45:13,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 19:45:13,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:45:13,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 19:45:13,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:45:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-15 19:45:13,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:45:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-15 19:45:13,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613563852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:45:13,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:45:13,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 24 [2022-03-15 19:45:13,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [990322524] [2022-03-15 19:45:13,502 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:45:13,509 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:45:13,590 INFO L252 McrAutomatonBuilder]: Finished intersection with 147 states and 265 transitions. [2022-03-15 19:45:13,590 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:45:14,404 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [71279#(<= thread2Thread1of1ForFork1_~i~1 1), 71280#(<= thread2Thread1of1ForFork1_~i~1 0), 71276#(or (<= thread2Thread1of1ForFork1_~i~1 (+ 3 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 71278#(<= thread2Thread1of1ForFork1_~i~1 2), 71277#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 71281#(= thread2Thread1of1ForFork1_~i~1 0)] [2022-03-15 19:45:14,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 19:45:14,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:45:14,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 19:45:14,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2022-03-15 19:45:14,405 INFO L87 Difference]: Start difference. First operand 2258 states and 8329 transitions. Second operand has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:15,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:45:15,079 INFO L93 Difference]: Finished difference Result 6184 states and 22972 transitions. [2022-03-15 19:45:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 19:45:15,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-03-15 19:45:15,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:45:15,099 INFO L225 Difference]: With dead ends: 6184 [2022-03-15 19:45:15,099 INFO L226 Difference]: Without dead ends: 5826 [2022-03-15 19:45:15,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 194 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=2137, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 19:45:15,100 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 314 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 19:45:15,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 82 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 19:45:15,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2022-03-15 19:45:15,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 2888. [2022-03-15 19:45:15,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2888 states, 2887 states have (on average 3.771388985105646) internal successors, (10888), 2887 states have internal predecessors, (10888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 10888 transitions. [2022-03-15 19:45:15,196 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 10888 transitions. Word has length 49 [2022-03-15 19:45:15,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:45:15,196 INFO L470 AbstractCegarLoop]: Abstraction has 2888 states and 10888 transitions. [2022-03-15 19:45:15,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 10888 transitions. [2022-03-15 19:45:15,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-15 19:45:15,203 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:45:15,203 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:45:15,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 19:45:15,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-15 19:45:15,431 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:45:15,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:45:15,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1386189623, now seen corresponding path program 18 times [2022-03-15 19:45:15,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:45:15,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585100490] [2022-03-15 19:45:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:45:15,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:45:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-15 19:45:15,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:45:15,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585100490] [2022-03-15 19:45:15,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585100490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:45:15,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897905368] [2022-03-15 19:45:15,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 19:45:15,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:15,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:45:15,551 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:45:15,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 19:45:15,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 19:45:15,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:45:15,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:45:15,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:45:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-15 19:45:15,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:45:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-15 19:45:16,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897905368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:45:16,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:45:16,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 18 [2022-03-15 19:45:16,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2117030096] [2022-03-15 19:45:16,030 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:45:16,038 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:45:16,287 INFO L252 McrAutomatonBuilder]: Finished intersection with 312 states and 676 transitions. [2022-03-15 19:45:16,287 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:45:17,826 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [83629#(or (< (+ 3 thread2Thread1of1ForFork1_~i~1) ~N~0) (<= ~N~0 (+ 2 thread2Thread1of1ForFork1_~i~1))), 83628#(or (< (+ 2 thread2Thread1of1ForFork1_~i~1) ~N~0) (<= ~N~0 (+ thread2Thread1of1ForFork1_~i~1 1))), 83631#(or (<= ~N~0 (+ thread2Thread1of1ForFork1_~i~1 4)) (< (+ 5 thread2Thread1of1ForFork1_~i~1) ~N~0)), 83630#(or (< (+ thread2Thread1of1ForFork1_~i~1 4) ~N~0) (<= ~N~0 (+ 3 thread2Thread1of1ForFork1_~i~1))), 83626#(< (+ thread2Thread1of1ForFork1_~i~1 1) ~N~0), 83627#(or (< (+ thread2Thread1of1ForFork1_~i~1 1) ~N~0) (<= ~N~0 thread2Thread1of1ForFork1_~i~1)), 83632#(or (< 5 ~N~0) (<= ~N~0 4)), 83405#(< thread2Thread1of1ForFork1_~i~1 ~N~0)] [2022-03-15 19:45:17,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 19:45:17,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:45:17,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 19:45:17,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-15 19:45:17,827 INFO L87 Difference]: Start difference. First operand 2888 states and 10888 transitions. Second operand has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:45:18,394 INFO L93 Difference]: Finished difference Result 4058 states and 14702 transitions. [2022-03-15 19:45:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 19:45:18,395 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-15 19:45:18,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:45:18,400 INFO L225 Difference]: With dead ends: 4058 [2022-03-15 19:45:18,401 INFO L226 Difference]: Without dead ends: 2890 [2022-03-15 19:45:18,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 19:45:18,401 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 218 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 19:45:18,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 186 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 19:45:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2022-03-15 19:45:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 2890. [2022-03-15 19:45:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2889 states have (on average 3.769470404984424) internal successors, (10890), 2889 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 10890 transitions. [2022-03-15 19:45:18,463 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 10890 transitions. Word has length 51 [2022-03-15 19:45:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:45:18,463 INFO L470 AbstractCegarLoop]: Abstraction has 2890 states and 10890 transitions. [2022-03-15 19:45:18,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 10890 transitions. [2022-03-15 19:45:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-15 19:45:18,470 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:45:18,470 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:45:18,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 19:45:18,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:18,683 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:45:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:45:18,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1934966651, now seen corresponding path program 19 times [2022-03-15 19:45:18,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:45:18,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631498123] [2022-03-15 19:45:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:45:18,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:45:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-15 19:45:18,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:45:18,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631498123] [2022-03-15 19:45:18,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631498123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:45:18,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105932835] [2022-03-15 19:45:18,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 19:45:18,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:18,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:45:18,808 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:45:18,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 19:45:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:18,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 19:45:18,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:45:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-15 19:45:19,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:45:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-15 19:45:19,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105932835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:45:19,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:45:19,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 19:45:19,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2021715896] [2022-03-15 19:45:19,334 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:45:19,342 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:45:19,595 INFO L252 McrAutomatonBuilder]: Finished intersection with 314 states and 678 transitions. [2022-03-15 19:45:19,596 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:45:22,065 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [93842#(or (<= (+ thread1Thread1of1ForFork0_~i~0 4) ~N~0) (<= ~N~0 (+ 2 thread1Thread1of1ForFork0_~i~0))), 93841#(or (<= ~N~0 (+ thread1Thread1of1ForFork0_~i~0 1)) (<= (+ 3 thread1Thread1of1ForFork0_~i~0) ~N~0)), 93844#(or (<= 5 ~N~0) (<= ~N~0 3)), 93840#(or (<= ~N~0 thread1Thread1of1ForFork0_~i~0) (<= (+ 2 thread1Thread1of1ForFork0_~i~0) ~N~0)), 93843#(or (<= (+ 5 thread1Thread1of1ForFork0_~i~0) ~N~0) (<= ~N~0 (+ 3 thread1Thread1of1ForFork0_~i~0)))] [2022-03-15 19:45:22,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 19:45:22,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:45:22,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 19:45:22,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 19:45:22,066 INFO L87 Difference]: Start difference. First operand 2890 states and 10890 transitions. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 17 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:45:22,369 INFO L93 Difference]: Finished difference Result 3248 states and 12270 transitions. [2022-03-15 19:45:22,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 19:45:22,369 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 17 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-15 19:45:22,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:45:22,375 INFO L225 Difference]: With dead ends: 3248 [2022-03-15 19:45:22,376 INFO L226 Difference]: Without dead ends: 3248 [2022-03-15 19:45:22,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 323 SyntacticMatches, 21 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=460, Invalid=1520, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 19:45:22,377 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 257 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:45:22,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 38 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:45:22,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2022-03-15 19:45:22,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 3248. [2022-03-15 19:45:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 3.7788728056667695) internal successors, (12270), 3247 states have internal predecessors, (12270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 12270 transitions. [2022-03-15 19:45:22,443 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 12270 transitions. Word has length 53 [2022-03-15 19:45:22,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:45:22,443 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 12270 transitions. [2022-03-15 19:45:22,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 17 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:22,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 12270 transitions. [2022-03-15 19:45:22,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-15 19:45:22,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:45:22,451 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:45:22,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 19:45:22,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:22,665 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:45:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:45:22,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1243178579, now seen corresponding path program 20 times [2022-03-15 19:45:22,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:45:22,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603006856] [2022-03-15 19:45:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:45:22,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:45:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-15 19:45:22,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:45:22,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603006856] [2022-03-15 19:45:22,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603006856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:45:22,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896529081] [2022-03-15 19:45:22,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:45:22,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:22,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:45:22,784 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:45:22,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 19:45:23,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:45:23,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:45:23,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 19:45:23,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:45:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-15 19:45:23,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:45:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-15 19:45:23,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896529081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:45:23,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:45:23,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 19:45:23,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1186807161] [2022-03-15 19:45:23,581 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:45:23,599 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:45:23,873 INFO L252 McrAutomatonBuilder]: Finished intersection with 338 states and 736 transitions. [2022-03-15 19:45:23,873 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:45:27,125 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [103959#(or (<= 5 ~N~0) (<= ~N~0 0)), 103958#(and (or (= thread3Thread1of1ForFork2_~i~2 0) (<= ~N~0 thread3Thread1of1ForFork2_~i~2)) (or (<= 5 ~N~0) (<= ~N~0 thread3Thread1of1ForFork2_~i~2)))] [2022-03-15 19:45:27,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 19:45:27,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:45:27,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 19:45:27,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2022-03-15 19:45:27,126 INFO L87 Difference]: Start difference. First operand 3248 states and 12270 transitions. Second operand has 15 states, 15 states have (on average 7.533333333333333) internal successors, (113), 14 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:27,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:45:27,395 INFO L93 Difference]: Finished difference Result 4240 states and 16106 transitions. [2022-03-15 19:45:27,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 19:45:27,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.533333333333333) internal successors, (113), 14 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-03-15 19:45:27,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:45:27,404 INFO L225 Difference]: With dead ends: 4240 [2022-03-15 19:45:27,404 INFO L226 Difference]: Without dead ends: 4140 [2022-03-15 19:45:27,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 353 SyntacticMatches, 19 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 19:45:27,405 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 188 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:45:27,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 22 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:45:27,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4140 states. [2022-03-15 19:45:27,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4140 to 3828. [2022-03-15 19:45:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 3.7737130911941468) internal successors, (14442), 3827 states have internal predecessors, (14442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 14442 transitions. [2022-03-15 19:45:27,472 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 14442 transitions. Word has length 54 [2022-03-15 19:45:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:45:27,472 INFO L470 AbstractCegarLoop]: Abstraction has 3828 states and 14442 transitions. [2022-03-15 19:45:27,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.533333333333333) internal successors, (113), 14 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 14442 transitions. [2022-03-15 19:45:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-15 19:45:27,481 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:45:27,482 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:45:27,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 19:45:27,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-15 19:45:27,707 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:45:27,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:45:27,708 INFO L85 PathProgramCache]: Analyzing trace with hash 642671775, now seen corresponding path program 21 times [2022-03-15 19:45:27,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:45:27,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868827447] [2022-03-15 19:45:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:45:27,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:45:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-15 19:45:27,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:45:27,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868827447] [2022-03-15 19:45:27,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868827447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:45:27,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169117819] [2022-03-15 19:45:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:45:27,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:27,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:45:27,855 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:45:27,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 19:45:28,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 19:45:28,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:45:28,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:45:28,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:45:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-03-15 19:45:28,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:45:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-03-15 19:45:28,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169117819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:45:28,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:45:28,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 19 [2022-03-15 19:45:28,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [276333587] [2022-03-15 19:45:28,263 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:45:28,310 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:45:28,569 INFO L252 McrAutomatonBuilder]: Finished intersection with 382 states and 840 transitions. [2022-03-15 19:45:28,569 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:45:32,052 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [116234#(= thread2Thread1of1ForFork1_~i~1 0), 116231#(<= thread2Thread1of1ForFork1_~i~1 2), 116230#(<= thread2Thread1of1ForFork1_~i~1 3), 116229#(<= thread2Thread1of1ForFork1_~i~1 4), 116233#(<= thread2Thread1of1ForFork1_~i~1 0), 116227#(<= ~p~0 4), 116228#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 116232#(<= thread2Thread1of1ForFork1_~i~1 1)] [2022-03-15 19:45:32,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 19:45:32,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:45:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 19:45:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-03-15 19:45:32,053 INFO L87 Difference]: Start difference. First operand 3828 states and 14442 transitions. Second operand has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 22 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:33,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:45:33,193 INFO L93 Difference]: Finished difference Result 7816 states and 29472 transitions. [2022-03-15 19:45:33,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 19:45:33,193 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 22 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-15 19:45:33,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:45:33,209 INFO L225 Difference]: With dead ends: 7816 [2022-03-15 19:45:33,210 INFO L226 Difference]: Without dead ends: 7468 [2022-03-15 19:45:33,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 447 SyntacticMatches, 24 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1055, Invalid=4347, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 19:45:33,211 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 355 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:45:33,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 107 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:45:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7468 states. [2022-03-15 19:45:33,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7468 to 4076. [2022-03-15 19:45:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4076 states, 4075 states have (on average 3.7678527607361962) internal successors, (15354), 4075 states have internal predecessors, (15354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4076 states to 4076 states and 15354 transitions. [2022-03-15 19:45:33,301 INFO L78 Accepts]: Start accepts. Automaton has 4076 states and 15354 transitions. Word has length 56 [2022-03-15 19:45:33,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:45:33,301 INFO L470 AbstractCegarLoop]: Abstraction has 4076 states and 15354 transitions. [2022-03-15 19:45:33,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 22 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4076 states and 15354 transitions. [2022-03-15 19:45:33,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-15 19:45:33,311 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:45:33,311 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:45:33,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 19:45:33,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 19:45:33,535 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:45:33,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:45:33,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1269012535, now seen corresponding path program 22 times [2022-03-15 19:45:33,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:45:33,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75342495] [2022-03-15 19:45:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:45:33,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:45:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-15 19:45:33,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:45:33,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75342495] [2022-03-15 19:45:33,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75342495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:45:33,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080188281] [2022-03-15 19:45:33,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 19:45:33,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:33,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:45:33,685 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:45:33,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 19:45:34,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 19:45:34,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:45:34,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 19:45:34,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:45:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-15 19:45:34,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:45:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-15 19:45:34,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080188281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:45:34,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:45:34,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 42 [2022-03-15 19:45:34,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [724835977] [2022-03-15 19:45:34,773 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:45:34,782 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:45:35,026 INFO L252 McrAutomatonBuilder]: Finished intersection with 360 states and 779 transitions. [2022-03-15 19:45:35,026 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:45:38,195 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [132722#(<= thread2Thread1of1ForFork1_~i~1 0), 132717#(<= thread2Thread1of1ForFork1_~i~1 3), 132719#(<= thread2Thread1of1ForFork1_~i~1 1), 132716#(<= thread2Thread1of1ForFork1_~i~1 4), 132723#(= thread2Thread1of1ForFork1_~i~1 0), 132721#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 132718#(<= thread2Thread1of1ForFork1_~i~1 2), 132720#(or (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0) (<= ~p~0 (+ thread3Thread1of1ForFork2_~i~2 4)))] [2022-03-15 19:45:38,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 19:45:38,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:45:38,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 19:45:38,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2135, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 19:45:38,196 INFO L87 Difference]: Start difference. First operand 4076 states and 15354 transitions. Second operand has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:39,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:45:39,292 INFO L93 Difference]: Finished difference Result 8810 states and 33366 transitions. [2022-03-15 19:45:39,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 19:45:39,292 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-15 19:45:39,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:45:39,312 INFO L225 Difference]: With dead ends: 8810 [2022-03-15 19:45:39,312 INFO L226 Difference]: Without dead ends: 8538 [2022-03-15 19:45:39,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 394 SyntacticMatches, 24 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3344 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1115, Invalid=6717, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 19:45:39,315 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 453 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:45:39,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 86 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:45:39,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8538 states. [2022-03-15 19:45:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8538 to 4552. [2022-03-15 19:45:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4552 states, 4551 states have (on average 3.763128982641178) internal successors, (17126), 4551 states have internal predecessors, (17126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:39,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4552 states to 4552 states and 17126 transitions. [2022-03-15 19:45:39,424 INFO L78 Accepts]: Start accepts. Automaton has 4552 states and 17126 transitions. Word has length 56 [2022-03-15 19:45:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:45:39,425 INFO L470 AbstractCegarLoop]: Abstraction has 4552 states and 17126 transitions. [2022-03-15 19:45:39,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:39,425 INFO L276 IsEmpty]: Start isEmpty. Operand 4552 states and 17126 transitions. [2022-03-15 19:45:39,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-15 19:45:39,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:45:39,435 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:45:39,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 19:45:39,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 19:45:39,660 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:45:39,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:45:39,660 INFO L85 PathProgramCache]: Analyzing trace with hash 677967625, now seen corresponding path program 23 times [2022-03-15 19:45:39,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:45:39,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369157032] [2022-03-15 19:45:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:45:39,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:45:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-15 19:45:39,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:45:39,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369157032] [2022-03-15 19:45:39,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369157032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:45:39,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241078222] [2022-03-15 19:45:39,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 19:45:39,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:39,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:45:39,807 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:45:39,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 19:45:40,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 19:45:40,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:45:40,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 19:45:40,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:45:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-15 19:45:40,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:45:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-15 19:45:40,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241078222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:45:40,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:45:40,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 29 [2022-03-15 19:45:40,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1045507484] [2022-03-15 19:45:40,793 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:45:40,802 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:45:41,092 INFO L252 McrAutomatonBuilder]: Finished intersection with 336 states and 713 transitions. [2022-03-15 19:45:41,092 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:45:43,823 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [151114#(<= thread2Thread1of1ForFork1_~i~1 4), 151116#(<= thread2Thread1of1ForFork1_~i~1 2), 151121#(= thread2Thread1of1ForFork1_~i~1 0), 151120#(<= thread2Thread1of1ForFork1_~i~1 0), 151118#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 151117#(or (<= ~p~0 (+ 3 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 151115#(<= thread2Thread1of1ForFork1_~i~1 3), 151119#(<= thread2Thread1of1ForFork1_~i~1 1)] [2022-03-15 19:45:43,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 19:45:43,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:45:43,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 19:45:43,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 19:45:43,824 INFO L87 Difference]: Start difference. First operand 4552 states and 17126 transitions. Second operand has 22 states, 22 states have (on average 6.681818181818182) internal successors, (147), 22 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:44,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:45:44,914 INFO L93 Difference]: Finished difference Result 14112 states and 53750 transitions. [2022-03-15 19:45:44,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 19:45:44,915 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.681818181818182) internal successors, (147), 22 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-15 19:45:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:45:44,948 INFO L225 Difference]: With dead ends: 14112 [2022-03-15 19:45:44,948 INFO L226 Difference]: Without dead ends: 13472 [2022-03-15 19:45:44,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 388 SyntacticMatches, 24 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3450 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1240, Invalid=5240, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 19:45:44,949 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 464 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:45:44,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 90 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:45:44,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13472 states. [2022-03-15 19:45:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13472 to 5540. [2022-03-15 19:45:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5540 states, 5539 states have (on average 3.849792381296263) internal successors, (21324), 5539 states have internal predecessors, (21324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:45,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 21324 transitions. [2022-03-15 19:45:45,125 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 21324 transitions. Word has length 56 [2022-03-15 19:45:45,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:45:45,125 INFO L470 AbstractCegarLoop]: Abstraction has 5540 states and 21324 transitions. [2022-03-15 19:45:45,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.681818181818182) internal successors, (147), 22 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:45,125 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 21324 transitions. [2022-03-15 19:45:45,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-15 19:45:45,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:45:45,136 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:45:45,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 19:45:45,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:45,351 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:45:45,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:45:45,352 INFO L85 PathProgramCache]: Analyzing trace with hash 416306761, now seen corresponding path program 24 times [2022-03-15 19:45:45,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:45:45,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556020734] [2022-03-15 19:45:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:45:45,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:45:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-15 19:45:45,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:45:45,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556020734] [2022-03-15 19:45:45,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556020734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:45:45,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192310385] [2022-03-15 19:45:45,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 19:45:45,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:45,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:45:45,478 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:45:45,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 19:45:45,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 19:45:45,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:45:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:45:45,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:45:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-15 19:45:45,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:45:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-15 19:45:45,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192310385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:45:45,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:45:45,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 19 [2022-03-15 19:45:45,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [892927970] [2022-03-15 19:45:45,987 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:45:45,996 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:45:46,214 INFO L252 McrAutomatonBuilder]: Finished intersection with 312 states and 647 transitions. [2022-03-15 19:45:46,215 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:45:48,730 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [176796#(<= thread2Thread1of1ForFork1_~i~1 4), 176797#(<= thread2Thread1of1ForFork1_~i~1 3), 176795#(or (<= ~p~0 (+ 2 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 176800#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 176799#(<= thread2Thread1of1ForFork1_~i~1 1), 176801#(<= thread2Thread1of1ForFork1_~i~1 0), 176802#(= thread2Thread1of1ForFork1_~i~1 0), 176798#(<= thread2Thread1of1ForFork1_~i~1 2)] [2022-03-15 19:45:48,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 19:45:48,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:45:48,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 19:45:48,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-03-15 19:45:48,731 INFO L87 Difference]: Start difference. First operand 5540 states and 21324 transitions. Second operand has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:45:49,797 INFO L93 Difference]: Finished difference Result 12488 states and 47852 transitions. [2022-03-15 19:45:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 19:45:49,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-15 19:45:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:45:49,825 INFO L225 Difference]: With dead ends: 12488 [2022-03-15 19:45:49,825 INFO L226 Difference]: Without dead ends: 11880 [2022-03-15 19:45:49,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 374 SyntacticMatches, 23 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=974, Invalid=3856, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 19:45:49,827 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 419 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:45:49,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 103 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:45:49,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11880 states. [2022-03-15 19:45:49,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11880 to 6332. [2022-03-15 19:45:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6332 states, 6331 states have (on average 3.9383983572895276) internal successors, (24934), 6331 states have internal predecessors, (24934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6332 states to 6332 states and 24934 transitions. [2022-03-15 19:45:49,996 INFO L78 Accepts]: Start accepts. Automaton has 6332 states and 24934 transitions. Word has length 56 [2022-03-15 19:45:49,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:45:49,997 INFO L470 AbstractCegarLoop]: Abstraction has 6332 states and 24934 transitions. [2022-03-15 19:45:49,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 6332 states and 24934 transitions. [2022-03-15 19:45:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-15 19:45:50,011 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:45:50,011 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:45:50,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-15 19:45:50,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:50,212 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:45:50,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:45:50,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1187492649, now seen corresponding path program 25 times [2022-03-15 19:45:50,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:45:50,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118062441] [2022-03-15 19:45:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:45:50,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:45:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-15 19:45:50,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:45:50,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118062441] [2022-03-15 19:45:50,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118062441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:45:50,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433385591] [2022-03-15 19:45:50,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 19:45:50,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:50,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:45:50,345 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:45:50,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 19:45:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:50,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 19:45:50,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:45:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-15 19:45:50,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:45:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-15 19:45:50,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433385591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:45:50,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:45:50,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 28 [2022-03-15 19:45:50,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [244714657] [2022-03-15 19:45:50,890 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:45:50,903 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:45:51,126 INFO L252 McrAutomatonBuilder]: Finished intersection with 171 states and 309 transitions. [2022-03-15 19:45:51,127 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:45:52,033 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [202447#(<= thread2Thread1of1ForFork1_~i~1 0), 202443#(<= thread2Thread1of1ForFork1_~i~1 3), 202446#(<= thread2Thread1of1ForFork1_~i~1 1), 202448#(= thread2Thread1of1ForFork1_~i~1 0), 202445#(<= thread2Thread1of1ForFork1_~i~1 2), 202442#(or (<= thread2Thread1of1ForFork1_~i~1 (+ thread3Thread1of1ForFork2_~i~2 4)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 202444#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0))] [2022-03-15 19:45:52,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 19:45:52,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:45:52,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 19:45:52,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 19:45:52,034 INFO L87 Difference]: Start difference. First operand 6332 states and 24934 transitions. Second operand has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:52,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:45:52,957 INFO L93 Difference]: Finished difference Result 16292 states and 63482 transitions. [2022-03-15 19:45:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 19:45:52,957 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-15 19:45:52,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:45:52,999 INFO L225 Difference]: With dead ends: 16292 [2022-03-15 19:45:52,999 INFO L226 Difference]: Without dead ends: 15704 [2022-03-15 19:45:53,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 231 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=868, Invalid=3688, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 19:45:53,000 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 494 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:45:53,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 100 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:45:53,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15704 states. [2022-03-15 19:45:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15704 to 9148. [2022-03-15 19:45:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9148 states, 9147 states have (on average 4.037170657046026) internal successors, (36928), 9147 states have internal predecessors, (36928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9148 states to 9148 states and 36928 transitions. [2022-03-15 19:45:53,231 INFO L78 Accepts]: Start accepts. Automaton has 9148 states and 36928 transitions. Word has length 56 [2022-03-15 19:45:53,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:45:53,232 INFO L470 AbstractCegarLoop]: Abstraction has 9148 states and 36928 transitions. [2022-03-15 19:45:53,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:53,232 INFO L276 IsEmpty]: Start isEmpty. Operand 9148 states and 36928 transitions. [2022-03-15 19:45:53,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-15 19:45:53,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:45:53,250 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:45:53,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 19:45:53,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:53,452 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:45:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:45:53,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1357253929, now seen corresponding path program 26 times [2022-03-15 19:45:53,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:45:53,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099970343] [2022-03-15 19:45:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:45:53,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:45:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-15 19:45:53,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:45:53,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099970343] [2022-03-15 19:45:53,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099970343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:45:53,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093925913] [2022-03-15 19:45:53,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:45:53,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:53,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:45:53,580 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:45:53,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 19:45:53,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:45:53,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:45:53,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 19:45:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:45:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-15 19:45:54,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:45:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-15 19:45:54,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093925913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:45:54,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:45:54,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 27 [2022-03-15 19:45:54,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1865394156] [2022-03-15 19:45:54,237 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:45:54,245 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:45:54,416 INFO L252 McrAutomatonBuilder]: Finished intersection with 183 states and 333 transitions. [2022-03-15 19:45:54,417 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:45:55,417 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [237498#(= thread2Thread1of1ForFork1_~i~1 0), 237494#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 237499#(or (<= thread2Thread1of1ForFork1_~i~1 (+ 3 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 237497#(<= thread2Thread1of1ForFork1_~i~1 0), 237495#(<= thread2Thread1of1ForFork1_~i~1 2), 237496#(<= thread2Thread1of1ForFork1_~i~1 1), 237493#(<= thread2Thread1of1ForFork1_~i~1 3)] [2022-03-15 19:45:55,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 19:45:55,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:45:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 19:45:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 19:45:55,418 INFO L87 Difference]: Start difference. First operand 9148 states and 36928 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:56,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:45:56,269 INFO L93 Difference]: Finished difference Result 15532 states and 61824 transitions. [2022-03-15 19:45:56,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 19:45:56,270 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-15 19:45:56,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:45:56,310 INFO L225 Difference]: With dead ends: 15532 [2022-03-15 19:45:56,310 INFO L226 Difference]: Without dead ends: 15188 [2022-03-15 19:45:56,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 240 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=763, Invalid=3143, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 19:45:56,311 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 458 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:45:56,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 98 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:45:56,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15188 states. [2022-03-15 19:45:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15188 to 8680. [2022-03-15 19:45:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8680 states, 8679 states have (on average 4.038022813688213) internal successors, (35046), 8679 states have internal predecessors, (35046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8680 states to 8680 states and 35046 transitions. [2022-03-15 19:45:56,568 INFO L78 Accepts]: Start accepts. Automaton has 8680 states and 35046 transitions. Word has length 56 [2022-03-15 19:45:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:45:56,569 INFO L470 AbstractCegarLoop]: Abstraction has 8680 states and 35046 transitions. [2022-03-15 19:45:56,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:56,569 INFO L276 IsEmpty]: Start isEmpty. Operand 8680 states and 35046 transitions. [2022-03-15 19:45:56,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-15 19:45:56,585 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:45:56,585 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:45:56,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 19:45:56,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-15 19:45:56,786 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:45:56,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:45:56,786 INFO L85 PathProgramCache]: Analyzing trace with hash -156293531, now seen corresponding path program 27 times [2022-03-15 19:45:56,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:45:56,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687016590] [2022-03-15 19:45:56,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:45:56,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:45:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:45:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-15 19:45:56,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:45:56,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687016590] [2022-03-15 19:45:56,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687016590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:45:56,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577290104] [2022-03-15 19:45:56,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:45:56,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:45:56,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:45:56,991 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:45:56,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 19:45:57,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 19:45:57,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:45:57,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:45:57,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:45:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-15 19:45:57,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:45:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-15 19:45:57,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577290104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:45:57,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:45:57,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 19 [2022-03-15 19:45:57,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1395320783] [2022-03-15 19:45:57,675 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:45:57,688 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:45:57,830 INFO L252 McrAutomatonBuilder]: Finished intersection with 165 states and 295 transitions. [2022-03-15 19:45:57,830 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:45:58,704 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [270832#(= thread2Thread1of1ForFork1_~i~1 0), 270828#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 270833#(or (<= thread2Thread1of1ForFork1_~i~1 (+ 3 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 270830#(<= thread2Thread1of1ForFork1_~i~1 1), 270829#(<= thread2Thread1of1ForFork1_~i~1 2), 270831#(<= thread2Thread1of1ForFork1_~i~1 0)] [2022-03-15 19:45:58,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 19:45:58,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:45:58,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 19:45:58,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-03-15 19:45:58,705 INFO L87 Difference]: Start difference. First operand 8680 states and 35046 transitions. Second operand has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:45:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:45:59,645 INFO L93 Difference]: Finished difference Result 21300 states and 84768 transitions. [2022-03-15 19:45:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 19:45:59,645 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-15 19:45:59,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:45:59,701 INFO L225 Difference]: With dead ends: 21300 [2022-03-15 19:45:59,701 INFO L226 Difference]: Without dead ends: 20628 [2022-03-15 19:45:59,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 229 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=535, Invalid=2015, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 19:45:59,702 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 403 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 19:45:59,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 113 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 19:45:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20628 states. [2022-03-15 19:45:59,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20628 to 9976. [2022-03-15 19:45:59,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9976 states, 9975 states have (on average 4.054736842105263) internal successors, (40446), 9975 states have internal predecessors, (40446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9976 states to 9976 states and 40446 transitions. [2022-03-15 19:46:00,026 INFO L78 Accepts]: Start accepts. Automaton has 9976 states and 40446 transitions. Word has length 56 [2022-03-15 19:46:00,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:46:00,027 INFO L470 AbstractCegarLoop]: Abstraction has 9976 states and 40446 transitions. [2022-03-15 19:46:00,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 9976 states and 40446 transitions. [2022-03-15 19:46:00,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-15 19:46:00,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:46:00,045 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:46:00,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 19:46:00,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:46:00,245 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:46:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:46:00,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1985955304, now seen corresponding path program 28 times [2022-03-15 19:46:00,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:46:00,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822431346] [2022-03-15 19:46:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:46:00,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:46:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:46:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-15 19:46:00,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:46:00,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822431346] [2022-03-15 19:46:00,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822431346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:46:00,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612352335] [2022-03-15 19:46:00,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 19:46:00,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:46:00,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:46:00,433 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:46:00,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 19:46:00,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 19:46:00,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:46:00,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 19:46:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:46:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-03-15 19:46:00,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:46:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-03-15 19:46:01,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612352335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:46:01,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:46:01,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-03-15 19:46:01,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1662876930] [2022-03-15 19:46:01,024 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:46:01,032 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:46:01,306 INFO L252 McrAutomatonBuilder]: Finished intersection with 390 states and 856 transitions. [2022-03-15 19:46:01,306 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:46:03,393 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [312543#(or (< (+ 2 thread2Thread1of1ForFork1_~i~1) ~N~0) (<= ~N~0 (+ thread2Thread1of1ForFork1_~i~1 1))), 312545#(or (< (+ thread2Thread1of1ForFork1_~i~1 4) ~N~0) (<= ~N~0 (+ 3 thread2Thread1of1ForFork1_~i~1))), 312547#(or (<= ~N~0 (+ 5 thread2Thread1of1ForFork1_~i~1)) (< (+ 6 thread2Thread1of1ForFork1_~i~1) ~N~0)), 312542#(or (< (+ thread2Thread1of1ForFork1_~i~1 1) ~N~0) (<= ~N~0 thread2Thread1of1ForFork1_~i~1)), 312540#(< thread2Thread1of1ForFork1_~i~1 ~N~0), 312544#(or (< (+ 3 thread2Thread1of1ForFork1_~i~1) ~N~0) (<= ~N~0 (+ 2 thread2Thread1of1ForFork1_~i~1))), 312541#(< (+ thread2Thread1of1ForFork1_~i~1 1) ~N~0), 312546#(or (<= ~N~0 (+ thread2Thread1of1ForFork1_~i~1 4)) (< (+ 5 thread2Thread1of1ForFork1_~i~1) ~N~0)), 312548#(or (<= ~N~0 5) (< 6 ~N~0))] [2022-03-15 19:46:03,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 19:46:03,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:46:03,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 19:46:03,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 19:46:03,394 INFO L87 Difference]: Start difference. First operand 9976 states and 40446 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 23 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:04,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:46:04,105 INFO L93 Difference]: Finished difference Result 13559 states and 52500 transitions. [2022-03-15 19:46:04,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 19:46:04,105 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 23 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-03-15 19:46:04,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:46:04,130 INFO L225 Difference]: With dead ends: 13559 [2022-03-15 19:46:04,130 INFO L226 Difference]: Without dead ends: 9978 [2022-03-15 19:46:04,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 417 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=430, Invalid=3110, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 19:46:04,131 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 214 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:46:04,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 220 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:46:04,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9978 states. [2022-03-15 19:46:04,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9978 to 9978. [2022-03-15 19:46:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9978 states, 9977 states have (on average 4.054124486318533) internal successors, (40448), 9977 states have internal predecessors, (40448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9978 states to 9978 states and 40448 transitions. [2022-03-15 19:46:04,314 INFO L78 Accepts]: Start accepts. Automaton has 9978 states and 40448 transitions. Word has length 58 [2022-03-15 19:46:04,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:46:04,314 INFO L470 AbstractCegarLoop]: Abstraction has 9978 states and 40448 transitions. [2022-03-15 19:46:04,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 23 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:04,314 INFO L276 IsEmpty]: Start isEmpty. Operand 9978 states and 40448 transitions. [2022-03-15 19:46:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-15 19:46:04,332 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:46:04,332 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:46:04,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 19:46:04,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:46:04,532 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:46:04,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:46:04,533 INFO L85 PathProgramCache]: Analyzing trace with hash 126982938, now seen corresponding path program 29 times [2022-03-15 19:46:04,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:46:04,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444737296] [2022-03-15 19:46:04,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:46:04,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:46:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:46:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-03-15 19:46:04,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:46:04,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444737296] [2022-03-15 19:46:04,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444737296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:46:04,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62821602] [2022-03-15 19:46:04,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 19:46:04,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:46:04,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:46:04,720 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:46:04,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 19:46:05,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 19:46:05,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:46:05,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 19:46:05,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:46:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-03-15 19:46:06,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:46:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-03-15 19:46:06,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62821602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:46:06,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:46:06,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 28 [2022-03-15 19:46:06,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1585295450] [2022-03-15 19:46:06,122 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:46:06,131 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:46:06,568 INFO L252 McrAutomatonBuilder]: Finished intersection with 392 states and 858 transitions. [2022-03-15 19:46:06,568 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:46:09,941 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [346485#(or (<= 6 ~N~0) (<= ~N~0 4)), 346481#(or (<= ~N~0 (+ thread1Thread1of1ForFork0_~i~0 1)) (<= (+ 3 thread1Thread1of1ForFork0_~i~0) ~N~0)), 346482#(or (<= (+ thread1Thread1of1ForFork0_~i~0 4) ~N~0) (<= ~N~0 (+ 2 thread1Thread1of1ForFork0_~i~0))), 346480#(or (<= ~N~0 thread1Thread1of1ForFork0_~i~0) (<= (+ 2 thread1Thread1of1ForFork0_~i~0) ~N~0)), 346484#(or (<= ~N~0 (+ thread1Thread1of1ForFork0_~i~0 4)) (<= (+ 6 thread1Thread1of1ForFork0_~i~0) ~N~0)), 346483#(or (<= (+ 5 thread1Thread1of1ForFork0_~i~0) ~N~0) (<= ~N~0 (+ 3 thread1Thread1of1ForFork0_~i~0)))] [2022-03-15 19:46:09,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 19:46:09,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:46:09,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 19:46:09,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 19:46:09,942 INFO L87 Difference]: Start difference. First operand 9978 states and 40448 transitions. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:46:10,350 INFO L93 Difference]: Finished difference Result 11082 states and 44997 transitions. [2022-03-15 19:46:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 19:46:10,351 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-03-15 19:46:10,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:46:10,378 INFO L225 Difference]: With dead ends: 11082 [2022-03-15 19:46:10,378 INFO L226 Difference]: Without dead ends: 11082 [2022-03-15 19:46:10,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 406 SyntacticMatches, 25 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=415, Invalid=1747, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 19:46:10,379 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 323 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:46:10,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 46 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:46:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11082 states. [2022-03-15 19:46:10,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11082 to 11082. [2022-03-15 19:46:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11082 states, 11081 states have (on average 4.060734590740908) internal successors, (44997), 11081 states have internal predecessors, (44997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11082 states to 11082 states and 44997 transitions. [2022-03-15 19:46:10,579 INFO L78 Accepts]: Start accepts. Automaton has 11082 states and 44997 transitions. Word has length 60 [2022-03-15 19:46:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:46:10,579 INFO L470 AbstractCegarLoop]: Abstraction has 11082 states and 44997 transitions. [2022-03-15 19:46:10,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:10,579 INFO L276 IsEmpty]: Start isEmpty. Operand 11082 states and 44997 transitions. [2022-03-15 19:46:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-15 19:46:10,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:46:10,599 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:46:10,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-15 19:46:10,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-15 19:46:10,799 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:46:10,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:46:10,800 INFO L85 PathProgramCache]: Analyzing trace with hash 30820268, now seen corresponding path program 30 times [2022-03-15 19:46:10,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:46:10,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177976778] [2022-03-15 19:46:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:46:10,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:46:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:46:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-15 19:46:10,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:46:10,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177976778] [2022-03-15 19:46:10,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177976778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:46:10,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887605325] [2022-03-15 19:46:10,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 19:46:10,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:46:10,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:46:10,943 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:46:10,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 19:46:11,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 19:46:11,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:46:11,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:46:11,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:46:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-15 19:46:11,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:46:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-15 19:46:11,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887605325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:46:11,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:46:11,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 19 [2022-03-15 19:46:11,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1811527039] [2022-03-15 19:46:11,436 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:46:11,446 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:46:11,959 INFO L252 McrAutomatonBuilder]: Finished intersection with 420 states and 926 transitions. [2022-03-15 19:46:11,960 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:46:16,121 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [380138#(or (<= 6 ~N~0) (<= ~N~0 0)), 380137#(and (or (<= 6 ~N~0) (<= ~N~0 thread3Thread1of1ForFork2_~i~2)) (or (= thread3Thread1of1ForFork2_~i~2 0) (<= ~N~0 thread3Thread1of1ForFork2_~i~2)))] [2022-03-15 19:46:16,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 19:46:16,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:46:16,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 19:46:16,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-15 19:46:16,122 INFO L87 Difference]: Start difference. First operand 11082 states and 44997 transitions. Second operand has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:46:16,474 INFO L93 Difference]: Finished difference Result 14808 states and 60532 transitions. [2022-03-15 19:46:16,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 19:46:16,474 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-03-15 19:46:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:46:16,512 INFO L225 Difference]: With dead ends: 14808 [2022-03-15 19:46:16,512 INFO L226 Difference]: Without dead ends: 14654 [2022-03-15 19:46:16,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 451 SyntacticMatches, 22 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 19:46:16,512 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 243 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:46:16,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 23 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:46:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14654 states. [2022-03-15 19:46:16,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14654 to 13766. [2022-03-15 19:46:16,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13766 states, 13765 states have (on average 4.028405375953505) internal successors, (55451), 13765 states have internal predecessors, (55451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13766 states to 13766 states and 55451 transitions. [2022-03-15 19:46:16,770 INFO L78 Accepts]: Start accepts. Automaton has 13766 states and 55451 transitions. Word has length 61 [2022-03-15 19:46:16,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:46:16,771 INFO L470 AbstractCegarLoop]: Abstraction has 13766 states and 55451 transitions. [2022-03-15 19:46:16,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 13766 states and 55451 transitions. [2022-03-15 19:46:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 19:46:16,801 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:46:16,801 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:46:16,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-15 19:46:17,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 19:46:17,002 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:46:17,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:46:17,003 INFO L85 PathProgramCache]: Analyzing trace with hash -497527880, now seen corresponding path program 31 times [2022-03-15 19:46:17,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:46:17,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869387048] [2022-03-15 19:46:17,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:46:17,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:46:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:46:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 50 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:46:17,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:46:17,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869387048] [2022-03-15 19:46:17,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869387048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:46:17,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574500114] [2022-03-15 19:46:17,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 19:46:17,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:46:17,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:46:17,260 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:46:17,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 19:46:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:46:17,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 19:46:17,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:46:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 31 proven. 41 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:46:17,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:46:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 31 proven. 41 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:46:17,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574500114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:46:17,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:46:17,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2022-03-15 19:46:17,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [48532869] [2022-03-15 19:46:17,976 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:46:17,992 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:46:18,582 INFO L252 McrAutomatonBuilder]: Finished intersection with 468 states and 1040 transitions. [2022-03-15 19:46:18,582 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:46:22,940 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [422918#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 422921#(<= thread2Thread1of1ForFork1_~i~1 1), 422920#(<= thread2Thread1of1ForFork1_~i~1 2), 422919#(<= thread2Thread1of1ForFork1_~i~1 3), 422917#(<= thread2Thread1of1ForFork1_~i~1 4), 422923#(= thread2Thread1of1ForFork1_~i~1 0), 422915#(<= ~p~0 5), 422922#(<= thread2Thread1of1ForFork1_~i~1 0), 422916#(<= thread2Thread1of1ForFork1_~i~1 5)] [2022-03-15 19:46:22,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 19:46:22,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:46:22,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 19:46:22,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 19:46:22,942 INFO L87 Difference]: Start difference. First operand 13766 states and 55451 transitions. Second operand has 25 states, 25 states have (on average 6.8) internal successors, (170), 25 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:24,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:46:24,327 INFO L93 Difference]: Finished difference Result 21946 states and 87728 transitions. [2022-03-15 19:46:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 19:46:24,328 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.8) internal successors, (170), 25 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 19:46:24,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:46:24,388 INFO L225 Difference]: With dead ends: 21946 [2022-03-15 19:46:24,388 INFO L226 Difference]: Without dead ends: 21518 [2022-03-15 19:46:24,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 534 SyntacticMatches, 26 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2082, Invalid=9474, Unknown=0, NotChecked=0, Total=11556 [2022-03-15 19:46:24,391 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 488 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:46:24,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 107 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:46:24,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21518 states. [2022-03-15 19:46:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21518 to 14042. [2022-03-15 19:46:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14042 states, 14041 states have (on average 4.021579659568407) internal successors, (56467), 14041 states have internal predecessors, (56467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14042 states to 14042 states and 56467 transitions. [2022-03-15 19:46:24,812 INFO L78 Accepts]: Start accepts. Automaton has 14042 states and 56467 transitions. Word has length 63 [2022-03-15 19:46:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:46:24,812 INFO L470 AbstractCegarLoop]: Abstraction has 14042 states and 56467 transitions. [2022-03-15 19:46:24,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.8) internal successors, (170), 25 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 14042 states and 56467 transitions. [2022-03-15 19:46:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 19:46:24,845 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:46:24,845 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:46:24,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-15 19:46:25,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-15 19:46:25,059 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:46:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:46:25,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1407744352, now seen corresponding path program 32 times [2022-03-15 19:46:25,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:46:25,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381976712] [2022-03-15 19:46:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:46:25,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:46:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:46:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 50 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:46:25,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:46:25,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381976712] [2022-03-15 19:46:25,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381976712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:46:25,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325042187] [2022-03-15 19:46:25,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:46:25,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:46:25,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:46:25,443 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:46:25,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 19:46:25,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:46:25,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:46:25,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 19:46:25,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:46:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 50 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:46:25,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:46:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 49 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-15 19:46:26,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325042187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:46:26,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:46:26,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 35 [2022-03-15 19:46:26,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [987814216] [2022-03-15 19:46:26,145 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:46:26,155 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:46:26,795 INFO L252 McrAutomatonBuilder]: Finished intersection with 444 states and 973 transitions. [2022-03-15 19:46:26,796 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:46:30,714 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [473550#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 473549#(<= thread2Thread1of1ForFork1_~i~1 1), 473551#(<= thread2Thread1of1ForFork1_~i~1 0), 473546#(<= thread2Thread1of1ForFork1_~i~1 3), 473545#(<= thread2Thread1of1ForFork1_~i~1 4), 473548#(or (<= ~p~0 (+ 5 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 473547#(<= thread2Thread1of1ForFork1_~i~1 2), 473544#(<= thread2Thread1of1ForFork1_~i~1 5), 473552#(= thread2Thread1of1ForFork1_~i~1 0)] [2022-03-15 19:46:30,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 19:46:30,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:46:30,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 19:46:30,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1532, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 19:46:30,715 INFO L87 Difference]: Start difference. First operand 14042 states and 56467 transitions. Second operand has 25 states, 25 states have (on average 6.68) internal successors, (167), 25 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:32,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:46:32,023 INFO L93 Difference]: Finished difference Result 23750 states and 94693 transitions. [2022-03-15 19:46:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 19:46:32,023 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.68) internal successors, (167), 25 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 19:46:32,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:46:32,085 INFO L225 Difference]: With dead ends: 23750 [2022-03-15 19:46:32,085 INFO L226 Difference]: Without dead ends: 23406 [2022-03-15 19:46:32,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 506 SyntacticMatches, 27 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5096 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1813, Invalid=7889, Unknown=0, NotChecked=0, Total=9702 [2022-03-15 19:46:32,087 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 519 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:46:32,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 97 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:46:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23406 states. [2022-03-15 19:46:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23406 to 14814. [2022-03-15 19:46:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14814 states, 14813 states have (on average 4.006818335246067) internal successors, (59353), 14813 states have internal predecessors, (59353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:32,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14814 states to 14814 states and 59353 transitions. [2022-03-15 19:46:32,402 INFO L78 Accepts]: Start accepts. Automaton has 14814 states and 59353 transitions. Word has length 63 [2022-03-15 19:46:32,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:46:32,402 INFO L470 AbstractCegarLoop]: Abstraction has 14814 states and 59353 transitions. [2022-03-15 19:46:32,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.68) internal successors, (167), 25 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:32,402 INFO L276 IsEmpty]: Start isEmpty. Operand 14814 states and 59353 transitions. [2022-03-15 19:46:32,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 19:46:32,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:46:32,430 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:46:32,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 19:46:32,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 19:46:32,634 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:46:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:46:32,635 INFO L85 PathProgramCache]: Analyzing trace with hash -150062944, now seen corresponding path program 33 times [2022-03-15 19:46:32,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:46:32,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138679310] [2022-03-15 19:46:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:46:32,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:46:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:46:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:46:32,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:46:32,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138679310] [2022-03-15 19:46:32,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138679310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:46:32,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001285533] [2022-03-15 19:46:32,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:46:32,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:46:32,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:46:32,801 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:46:32,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 19:46:33,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 19:46:33,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:46:33,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:46:33,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:46:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-03-15 19:46:33,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:46:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-03-15 19:46:33,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001285533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:46:33,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:46:33,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6] total 21 [2022-03-15 19:46:33,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [812788427] [2022-03-15 19:46:33,354 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:46:33,454 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:46:34,014 INFO L252 McrAutomatonBuilder]: Finished intersection with 418 states and 901 transitions. [2022-03-15 19:46:34,015 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:46:37,661 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [527493#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 527497#(= thread2Thread1of1ForFork1_~i~1 0), 527491#(<= thread2Thread1of1ForFork1_~i~1 4), 527495#(<= thread2Thread1of1ForFork1_~i~1 1), 527494#(<= thread2Thread1of1ForFork1_~i~1 2), 527489#(<= thread2Thread1of1ForFork1_~i~1 5), 527496#(<= thread2Thread1of1ForFork1_~i~1 0), 527492#(<= thread2Thread1of1ForFork1_~i~1 3), 527490#(or (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0) (<= ~p~0 (+ thread3Thread1of1ForFork2_~i~2 4)))] [2022-03-15 19:46:37,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 19:46:37,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:46:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 19:46:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2022-03-15 19:46:37,662 INFO L87 Difference]: Start difference. First operand 14814 states and 59353 transitions. Second operand has 25 states, 25 states have (on average 6.56) internal successors, (164), 25 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:39,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:46:39,313 INFO L93 Difference]: Finished difference Result 38558 states and 153809 transitions. [2022-03-15 19:46:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-15 19:46:39,313 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.56) internal successors, (164), 25 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 19:46:39,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:46:39,422 INFO L225 Difference]: With dead ends: 38558 [2022-03-15 19:46:39,422 INFO L226 Difference]: Without dead ends: 37720 [2022-03-15 19:46:39,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 503 SyntacticMatches, 27 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1803, Invalid=6939, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 19:46:39,423 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 588 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 19:46:39,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 111 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 19:46:39,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37720 states. [2022-03-15 19:46:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37720 to 16330. [2022-03-15 19:46:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16330 states, 16329 states have (on average 4.036315757241717) internal successors, (65909), 16329 states have internal predecessors, (65909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16330 states to 16330 states and 65909 transitions. [2022-03-15 19:46:39,879 INFO L78 Accepts]: Start accepts. Automaton has 16330 states and 65909 transitions. Word has length 63 [2022-03-15 19:46:39,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:46:39,879 INFO L470 AbstractCegarLoop]: Abstraction has 16330 states and 65909 transitions. [2022-03-15 19:46:39,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.56) internal successors, (164), 25 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:39,879 INFO L276 IsEmpty]: Start isEmpty. Operand 16330 states and 65909 transitions. [2022-03-15 19:46:39,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 19:46:39,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:46:39,991 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:46:40,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 19:46:40,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 19:46:40,191 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:46:40,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:46:40,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1796917216, now seen corresponding path program 34 times [2022-03-15 19:46:40,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:46:40,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386720128] [2022-03-15 19:46:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:46:40,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:46:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:46:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:46:40,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:46:40,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386720128] [2022-03-15 19:46:40,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386720128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:46:40,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047018650] [2022-03-15 19:46:40,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 19:46:40,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:46:40,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:46:40,349 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:46:40,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 19:46:41,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 19:46:41,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:46:41,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 19:46:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:46:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:46:41,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:46:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 53 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-15 19:46:41,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047018650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:46:41,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:46:41,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 13] total 34 [2022-03-15 19:46:41,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2026555188] [2022-03-15 19:46:41,487 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:46:41,497 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:46:41,933 INFO L252 McrAutomatonBuilder]: Finished intersection with 392 states and 829 transitions. [2022-03-15 19:46:41,933 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:46:45,347 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [599322#(or (<= ~p~0 (+ 3 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 599314#(<= thread2Thread1of1ForFork1_~i~1 5), 599319#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 599315#(<= thread2Thread1of1ForFork1_~i~1 4), 599317#(<= thread2Thread1of1ForFork1_~i~1 2), 599316#(<= thread2Thread1of1ForFork1_~i~1 3), 599321#(= thread2Thread1of1ForFork1_~i~1 0), 599318#(<= thread2Thread1of1ForFork1_~i~1 1), 599320#(<= thread2Thread1of1ForFork1_~i~1 0)] [2022-03-15 19:46:45,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 19:46:45,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:46:45,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 19:46:45,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 19:46:45,348 INFO L87 Difference]: Start difference. First operand 16330 states and 65909 transitions. Second operand has 25 states, 25 states have (on average 6.44) internal successors, (161), 25 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:46,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:46:46,963 INFO L93 Difference]: Finished difference Result 32878 states and 130658 transitions. [2022-03-15 19:46:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-15 19:46:46,963 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.44) internal successors, (161), 25 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 19:46:46,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:46:47,151 INFO L225 Difference]: With dead ends: 32878 [2022-03-15 19:46:47,151 INFO L226 Difference]: Without dead ends: 32118 [2022-03-15 19:46:47,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 463 SyntacticMatches, 26 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5793 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2059, Invalid=8861, Unknown=0, NotChecked=0, Total=10920 [2022-03-15 19:46:47,152 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 514 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 19:46:47,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 122 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 19:46:47,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32118 states. [2022-03-15 19:46:47,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32118 to 18450. [2022-03-15 19:46:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18450 states, 18449 states have (on average 4.065423600195133) internal successors, (75003), 18449 states have internal predecessors, (75003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18450 states to 18450 states and 75003 transitions. [2022-03-15 19:46:47,565 INFO L78 Accepts]: Start accepts. Automaton has 18450 states and 75003 transitions. Word has length 63 [2022-03-15 19:46:47,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:46:47,565 INFO L470 AbstractCegarLoop]: Abstraction has 18450 states and 75003 transitions. [2022-03-15 19:46:47,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.44) internal successors, (161), 25 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 18450 states and 75003 transitions. [2022-03-15 19:46:47,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 19:46:47,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:46:47,599 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:46:47,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 19:46:47,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-15 19:46:47,799 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:46:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:46:47,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1535256352, now seen corresponding path program 35 times [2022-03-15 19:46:47,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:46:47,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371978202] [2022-03-15 19:46:47,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:46:47,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:46:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:46:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 13 proven. 59 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:46:47,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:46:47,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371978202] [2022-03-15 19:46:47,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371978202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:46:47,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726031092] [2022-03-15 19:46:47,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 19:46:47,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:46:47,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:46:47,943 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:46:47,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 19:46:49,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 19:46:49,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:46:49,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 19:46:49,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:46:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 19 proven. 53 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:46:49,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:46:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 49 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-15 19:46:49,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726031092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:46:49,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:46:49,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 12] total 33 [2022-03-15 19:46:49,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [796840923] [2022-03-15 19:46:49,496 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:46:49,506 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:46:50,026 INFO L252 McrAutomatonBuilder]: Finished intersection with 366 states and 757 transitions. [2022-03-15 19:46:50,026 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:46:52,984 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [669699#(<= thread2Thread1of1ForFork1_~i~1 0), 669696#(<= thread2Thread1of1ForFork1_~i~1 3), 669697#(<= thread2Thread1of1ForFork1_~i~1 2), 669698#(<= thread2Thread1of1ForFork1_~i~1 1), 669692#(or (<= ~p~0 (+ 2 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 669693#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 669694#(<= thread2Thread1of1ForFork1_~i~1 5), 669700#(= thread2Thread1of1ForFork1_~i~1 0), 669695#(<= thread2Thread1of1ForFork1_~i~1 4)] [2022-03-15 19:46:52,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 19:46:52,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:46:52,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 19:46:52,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1375, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 19:46:52,985 INFO L87 Difference]: Start difference. First operand 18450 states and 75003 transitions. Second operand has 25 states, 25 states have (on average 6.32) internal successors, (158), 25 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:46:54,740 INFO L93 Difference]: Finished difference Result 35980 states and 145340 transitions. [2022-03-15 19:46:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-15 19:46:54,740 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.32) internal successors, (158), 25 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 19:46:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:46:54,847 INFO L225 Difference]: With dead ends: 35980 [2022-03-15 19:46:54,847 INFO L226 Difference]: Without dead ends: 35166 [2022-03-15 19:46:54,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 437 SyntacticMatches, 26 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5446 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1981, Invalid=8525, Unknown=0, NotChecked=0, Total=10506 [2022-03-15 19:46:54,849 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 460 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 19:46:54,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 144 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 19:46:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35166 states. [2022-03-15 19:46:55,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35166 to 17570. [2022-03-15 19:46:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17570 states, 17569 states have (on average 4.062098013546588) internal successors, (71367), 17569 states have internal predecessors, (71367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17570 states to 17570 states and 71367 transitions. [2022-03-15 19:46:55,391 INFO L78 Accepts]: Start accepts. Automaton has 17570 states and 71367 transitions. Word has length 63 [2022-03-15 19:46:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:46:55,391 INFO L470 AbstractCegarLoop]: Abstraction has 17570 states and 71367 transitions. [2022-03-15 19:46:55,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.32) internal successors, (158), 25 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 17570 states and 71367 transitions. [2022-03-15 19:46:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 19:46:55,424 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:46:55,424 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:46:55,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 19:46:55,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 19:46:55,624 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:46:55,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:46:55,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1429232032, now seen corresponding path program 36 times [2022-03-15 19:46:55,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:46:55,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028276964] [2022-03-15 19:46:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:46:55,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:46:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:46:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 50 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:46:55,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:46:55,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028276964] [2022-03-15 19:46:55,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028276964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:46:55,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581298089] [2022-03-15 19:46:55,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 19:46:55,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:46:55,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:46:55,796 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:46:55,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 19:46:56,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 19:46:56,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:46:56,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:46:56,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:46:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-15 19:46:56,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:46:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-15 19:46:56,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581298089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:46:56,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:46:56,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6] total 21 [2022-03-15 19:46:56,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1521655826] [2022-03-15 19:46:56,476 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:46:56,486 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:46:56,859 INFO L252 McrAutomatonBuilder]: Finished intersection with 195 states and 353 transitions. [2022-03-15 19:46:56,860 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:46:57,938 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [741402#(<= thread2Thread1of1ForFork1_~i~1 0), 741400#(<= thread2Thread1of1ForFork1_~i~1 2), 741404#(or (<= thread2Thread1of1ForFork1_~i~1 (+ 5 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 741403#(= thread2Thread1of1ForFork1_~i~1 0), 741398#(<= thread2Thread1of1ForFork1_~i~1 4), 741399#(<= thread2Thread1of1ForFork1_~i~1 3), 741397#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 741401#(<= thread2Thread1of1ForFork1_~i~1 1)] [2022-03-15 19:46:57,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 19:46:57,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:46:57,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 19:46:57,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2022-03-15 19:46:57,939 INFO L87 Difference]: Start difference. First operand 17570 states and 71367 transitions. Second operand has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:46:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:46:59,379 INFO L93 Difference]: Finished difference Result 41176 states and 165856 transitions. [2022-03-15 19:46:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 19:46:59,380 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 19:46:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:46:59,499 INFO L225 Difference]: With dead ends: 41176 [2022-03-15 19:46:59,499 INFO L226 Difference]: Without dead ends: 40442 [2022-03-15 19:46:59,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 290 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1376, Invalid=5104, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 19:46:59,500 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 911 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 19:46:59,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 103 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 19:46:59,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40442 states. [2022-03-15 19:47:00,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40442 to 23360. [2022-03-15 19:47:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23360 states, 23359 states have (on average 4.117042681621645) internal successors, (96170), 23359 states have internal predecessors, (96170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23360 states to 23360 states and 96170 transitions. [2022-03-15 19:47:00,313 INFO L78 Accepts]: Start accepts. Automaton has 23360 states and 96170 transitions. Word has length 63 [2022-03-15 19:47:00,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:47:00,313 INFO L470 AbstractCegarLoop]: Abstraction has 23360 states and 96170 transitions. [2022-03-15 19:47:00,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:00,314 INFO L276 IsEmpty]: Start isEmpty. Operand 23360 states and 96170 transitions. [2022-03-15 19:47:00,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 19:47:00,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:47:00,356 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:47:00,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 19:47:00,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-15 19:47:00,557 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:47:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:47:00,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1361064864, now seen corresponding path program 37 times [2022-03-15 19:47:00,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:47:00,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195737581] [2022-03-15 19:47:00,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:47:00,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:47:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:47:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:47:00,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:47:00,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195737581] [2022-03-15 19:47:00,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195737581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:47:00,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280810236] [2022-03-15 19:47:00,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 19:47:00,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:47:00,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:47:00,744 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:47:00,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 19:47:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:47:01,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 19:47:01,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:47:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:47:01,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:47:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 19 proven. 50 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-15 19:47:01,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280810236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:47:01,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:47:01,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 13] total 33 [2022-03-15 19:47:01,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1155294631] [2022-03-15 19:47:01,485 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:47:01,627 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:47:01,888 INFO L252 McrAutomatonBuilder]: Finished intersection with 209 states and 381 transitions. [2022-03-15 19:47:01,888 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:47:03,136 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [829863#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 829868#(<= thread2Thread1of1ForFork1_~i~1 0), 829867#(<= thread2Thread1of1ForFork1_~i~1 1), 829865#(<= thread2Thread1of1ForFork1_~i~1 3), 829862#(or (<= thread2Thread1of1ForFork1_~i~1 (+ thread3Thread1of1ForFork2_~i~2 4)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 829864#(<= thread2Thread1of1ForFork1_~i~1 4), 829869#(= thread2Thread1of1ForFork1_~i~1 0), 829866#(<= thread2Thread1of1ForFork1_~i~1 2)] [2022-03-15 19:47:03,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 19:47:03,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:47:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 19:47:03,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1335, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 19:47:03,137 INFO L87 Difference]: Start difference. First operand 23360 states and 96170 transitions. Second operand has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:04,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:47:04,624 INFO L93 Difference]: Finished difference Result 40904 states and 167340 transitions. [2022-03-15 19:47:04,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 19:47:04,624 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 19:47:04,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:47:04,750 INFO L225 Difference]: With dead ends: 40904 [2022-03-15 19:47:04,750 INFO L226 Difference]: Without dead ends: 40440 [2022-03-15 19:47:04,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3277 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1446, Invalid=6210, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 19:47:04,751 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 786 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 19:47:04,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 95 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 19:47:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40440 states. [2022-03-15 19:47:05,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40440 to 22320. [2022-03-15 19:47:05,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22320 states, 22319 states have (on average 4.120345893633227) internal successors, (91962), 22319 states have internal predecessors, (91962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22320 states to 22320 states and 91962 transitions. [2022-03-15 19:47:05,382 INFO L78 Accepts]: Start accepts. Automaton has 22320 states and 91962 transitions. Word has length 63 [2022-03-15 19:47:05,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:47:05,382 INFO L470 AbstractCegarLoop]: Abstraction has 22320 states and 91962 transitions. [2022-03-15 19:47:05,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 22320 states and 91962 transitions. [2022-03-15 19:47:05,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 19:47:05,570 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:47:05,570 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:47:05,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 19:47:05,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:47:05,780 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:47:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:47:05,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1530826144, now seen corresponding path program 38 times [2022-03-15 19:47:05,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:47:05,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517768210] [2022-03-15 19:47:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:47:05,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:47:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:47:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:47:05,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:47:05,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517768210] [2022-03-15 19:47:05,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517768210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:47:05,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289871] [2022-03-15 19:47:05,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:47:05,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:47:05,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:47:05,930 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:47:05,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 19:47:06,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:47:06,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:47:06,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 19:47:06,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:47:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:47:06,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:47:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-15 19:47:06,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:47:06,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:47:06,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 12] total 32 [2022-03-15 19:47:06,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [89329850] [2022-03-15 19:47:06,617 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:47:06,712 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:47:07,000 INFO L252 McrAutomatonBuilder]: Finished intersection with 223 states and 409 transitions. [2022-03-15 19:47:07,000 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:47:08,399 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [915966#(= thread2Thread1of1ForFork1_~i~1 0), 915961#(<= thread2Thread1of1ForFork1_~i~1 4), 915959#(or (<= thread2Thread1of1ForFork1_~i~1 (+ 3 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 915963#(<= thread2Thread1of1ForFork1_~i~1 2), 915965#(<= thread2Thread1of1ForFork1_~i~1 0), 915964#(<= thread2Thread1of1ForFork1_~i~1 1), 915960#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 915962#(<= thread2Thread1of1ForFork1_~i~1 3)] [2022-03-15 19:47:08,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 19:47:08,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:47:08,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 19:47:08,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 19:47:08,400 INFO L87 Difference]: Start difference. First operand 22320 states and 91962 transitions. Second operand has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 23 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:09,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:47:09,671 INFO L93 Difference]: Finished difference Result 33246 states and 136619 transitions. [2022-03-15 19:47:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 19:47:09,671 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 23 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 19:47:09,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:47:09,765 INFO L225 Difference]: With dead ends: 33246 [2022-03-15 19:47:09,765 INFO L226 Difference]: Without dead ends: 32632 [2022-03-15 19:47:09,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 298 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1292, Invalid=5514, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 19:47:09,766 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 564 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:47:09,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 109 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:47:09,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32632 states. [2022-03-15 19:47:10,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32632 to 22320. [2022-03-15 19:47:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22320 states, 22319 states have (on average 4.13378735606434) internal successors, (92262), 22319 states have internal predecessors, (92262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22320 states to 22320 states and 92262 transitions. [2022-03-15 19:47:10,353 INFO L78 Accepts]: Start accepts. Automaton has 22320 states and 92262 transitions. Word has length 63 [2022-03-15 19:47:10,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:47:10,353 INFO L470 AbstractCegarLoop]: Abstraction has 22320 states and 92262 transitions. [2022-03-15 19:47:10,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.565217391304348) internal successors, (128), 23 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:10,353 INFO L276 IsEmpty]: Start isEmpty. Operand 22320 states and 92262 transitions. [2022-03-15 19:47:10,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 19:47:10,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:47:10,394 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:47:10,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 19:47:10,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:47:10,594 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:47:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:47:10,595 INFO L85 PathProgramCache]: Analyzing trace with hash -459304096, now seen corresponding path program 39 times [2022-03-15 19:47:10,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:47:10,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324826850] [2022-03-15 19:47:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:47:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:47:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:47:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 50 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:47:10,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:47:10,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324826850] [2022-03-15 19:47:10,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324826850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:47:10,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582606318] [2022-03-15 19:47:10,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:47:10,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:47:10,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:47:10,759 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:47:10,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 19:47:11,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 19:47:11,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:47:11,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:47:11,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:47:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-15 19:47:11,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:47:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-15 19:47:11,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582606318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:47:11,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:47:11,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6] total 21 [2022-03-15 19:47:11,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [92121660] [2022-03-15 19:47:11,373 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:47:11,384 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:47:11,689 INFO L252 McrAutomatonBuilder]: Finished intersection with 189 states and 339 transitions. [2022-03-15 19:47:11,689 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:47:12,834 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [994375#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 994378#(<= thread2Thread1of1ForFork1_~i~1 1), 994379#(<= thread2Thread1of1ForFork1_~i~1 0), 994381#(or (<= thread2Thread1of1ForFork1_~i~1 (+ thread3Thread1of1ForFork2_~i~2 4)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 994377#(<= thread2Thread1of1ForFork1_~i~1 2), 994380#(= thread2Thread1of1ForFork1_~i~1 0), 994376#(<= thread2Thread1of1ForFork1_~i~1 3)] [2022-03-15 19:47:12,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 19:47:12,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:47:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 19:47:12,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-03-15 19:47:12,835 INFO L87 Difference]: Start difference. First operand 22320 states and 92262 transitions. Second operand has 23 states, 23 states have (on average 5.391304347826087) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:47:14,425 INFO L93 Difference]: Finished difference Result 52878 states and 216877 transitions. [2022-03-15 19:47:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 19:47:14,426 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.391304347826087) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 19:47:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:47:14,601 INFO L225 Difference]: With dead ends: 52878 [2022-03-15 19:47:14,602 INFO L226 Difference]: Without dead ends: 51844 [2022-03-15 19:47:14,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 270 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=888, Invalid=3272, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 19:47:14,602 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 752 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 19:47:14,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 113 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 19:47:14,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51844 states. [2022-03-15 19:47:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51844 to 27600. [2022-03-15 19:47:15,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27600 states, 27599 states have (on average 4.158049204681329) internal successors, (114758), 27599 states have internal predecessors, (114758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27600 states to 27600 states and 114758 transitions. [2022-03-15 19:47:15,571 INFO L78 Accepts]: Start accepts. Automaton has 27600 states and 114758 transitions. Word has length 63 [2022-03-15 19:47:15,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:47:15,572 INFO L470 AbstractCegarLoop]: Abstraction has 27600 states and 114758 transitions. [2022-03-15 19:47:15,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.391304347826087) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 27600 states and 114758 transitions. [2022-03-15 19:47:15,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 19:47:15,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:47:15,629 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:47:15,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 19:47:15,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-15 19:47:15,830 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:47:15,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:47:15,830 INFO L85 PathProgramCache]: Analyzing trace with hash -366460832, now seen corresponding path program 40 times [2022-03-15 19:47:15,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:47:15,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134619167] [2022-03-15 19:47:15,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:47:15,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:47:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:47:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 50 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:47:15,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:47:15,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134619167] [2022-03-15 19:47:15,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134619167] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:47:15,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483353807] [2022-03-15 19:47:15,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 19:47:15,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:47:15,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:47:15,998 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:47:16,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 19:47:16,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 19:47:16,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:47:16,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 19:47:16,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:47:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 50 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:47:16,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:47:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 48 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-03-15 19:47:17,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483353807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:47:17,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:47:17,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 32 [2022-03-15 19:47:17,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [174275024] [2022-03-15 19:47:17,061 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:47:17,071 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:47:17,422 INFO L252 McrAutomatonBuilder]: Finished intersection with 183 states and 325 transitions. [2022-03-15 19:47:17,422 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:47:18,524 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1102980#(= thread2Thread1of1ForFork1_~i~1 0), 1102977#(<= thread2Thread1of1ForFork1_~i~1 2), 1102979#(<= thread2Thread1of1ForFork1_~i~1 0), 1102976#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 1102975#(or (<= thread2Thread1of1ForFork1_~i~1 (+ 3 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 1102978#(<= thread2Thread1of1ForFork1_~i~1 1)] [2022-03-15 19:47:18,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 19:47:18,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:47:18,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 19:47:18,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 19:47:18,525 INFO L87 Difference]: Start difference. First operand 27600 states and 114758 transitions. Second operand has 22 states, 22 states have (on average 5.409090909090909) internal successors, (119), 22 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:19,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:47:19,849 INFO L93 Difference]: Finished difference Result 52928 states and 217612 transitions. [2022-03-15 19:47:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 19:47:19,849 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.409090909090909) internal successors, (119), 22 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 19:47:19,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:47:20,026 INFO L225 Difference]: With dead ends: 52928 [2022-03-15 19:47:20,026 INFO L226 Difference]: Without dead ends: 51832 [2022-03-15 19:47:20,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 249 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=884, Invalid=3946, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 19:47:20,027 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 529 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 19:47:20,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 103 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 19:47:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51832 states. [2022-03-15 19:47:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51832 to 27000. [2022-03-15 19:47:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27000 states, 26999 states have (on average 4.154524241638579) internal successors, (112168), 26999 states have internal predecessors, (112168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27000 states to 27000 states and 112168 transitions. [2022-03-15 19:47:21,029 INFO L78 Accepts]: Start accepts. Automaton has 27000 states and 112168 transitions. Word has length 63 [2022-03-15 19:47:21,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:47:21,029 INFO L470 AbstractCegarLoop]: Abstraction has 27000 states and 112168 transitions. [2022-03-15 19:47:21,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.409090909090909) internal successors, (119), 22 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 27000 states and 112168 transitions. [2022-03-15 19:47:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-15 19:47:21,086 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:47:21,086 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:47:21,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 19:47:21,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 19:47:21,287 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:47:21,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:47:21,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1525406532, now seen corresponding path program 41 times [2022-03-15 19:47:21,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:47:21,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020660718] [2022-03-15 19:47:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:47:21,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:47:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:47:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-15 19:47:21,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:47:21,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020660718] [2022-03-15 19:47:21,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020660718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:47:21,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800507106] [2022-03-15 19:47:21,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 19:47:21,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:47:21,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:47:21,427 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:47:21,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 19:47:22,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 19:47:22,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:47:22,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 19:47:22,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:47:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 42 proven. 40 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-03-15 19:47:22,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:47:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-15 19:47:22,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800507106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:47:22,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:47:22,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 21] total 46 [2022-03-15 19:47:22,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [635347328] [2022-03-15 19:47:22,701 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:47:22,854 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:47:23,187 INFO L252 McrAutomatonBuilder]: Finished intersection with 203 states and 367 transitions. [2022-03-15 19:47:23,187 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:47:24,409 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1210428#(<= thread2Thread1of1ForFork1_~i~1 0), 1210424#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 2)), 1210427#(= thread3Thread1of1ForFork2_~i~2 0), 1210426#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 1210423#(or (<= thread2Thread1of1ForFork1_~i~1 (+ 3 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 1210425#(and (<= thread2Thread1of1ForFork1_~i~1 1) (= thread3Thread1of1ForFork2_~i~2 0))] [2022-03-15 19:47:24,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 19:47:24,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:47:24,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 19:47:24,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2256, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 19:47:24,410 INFO L87 Difference]: Start difference. First operand 27000 states and 112168 transitions. Second operand has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:47:25,644 INFO L93 Difference]: Finished difference Result 42944 states and 177970 transitions. [2022-03-15 19:47:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 19:47:25,644 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-03-15 19:47:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:47:25,772 INFO L225 Difference]: With dead ends: 42944 [2022-03-15 19:47:25,772 INFO L226 Difference]: Without dead ends: 42480 [2022-03-15 19:47:25,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 256 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1379, Invalid=5931, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 19:47:25,773 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 539 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:47:25,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 103 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:47:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42480 states. [2022-03-15 19:47:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42480 to 29120. [2022-03-15 19:47:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29120 states, 29119 states have (on average 4.1581785088773655) internal successors, (121082), 29119 states have internal predecessors, (121082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29120 states to 29120 states and 121082 transitions. [2022-03-15 19:47:26,664 INFO L78 Accepts]: Start accepts. Automaton has 29120 states and 121082 transitions. Word has length 63 [2022-03-15 19:47:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:47:26,665 INFO L470 AbstractCegarLoop]: Abstraction has 29120 states and 121082 transitions. [2022-03-15 19:47:26,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 29120 states and 121082 transitions. [2022-03-15 19:47:26,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-15 19:47:26,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:47:26,723 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:47:26,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 19:47:26,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-15 19:47:26,923 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:47:26,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:47:26,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1706906481, now seen corresponding path program 42 times [2022-03-15 19:47:26,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:47:26,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577088073] [2022-03-15 19:47:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:47:26,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:47:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:47:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 38 proven. 32 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-15 19:47:27,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:47:27,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577088073] [2022-03-15 19:47:27,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577088073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:47:27,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352108048] [2022-03-15 19:47:27,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 19:47:27,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:47:27,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:47:27,071 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:47:27,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 19:47:27,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 19:47:27,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:47:27,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:47:27,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:47:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-15 19:47:27,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:47:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-15 19:47:27,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352108048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:47:27,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:47:27,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6] total 22 [2022-03-15 19:47:27,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1487396470] [2022-03-15 19:47:27,882 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:47:27,900 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:47:28,528 INFO L252 McrAutomatonBuilder]: Finished intersection with 476 states and 1056 transitions. [2022-03-15 19:47:28,528 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:47:30,951 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [1312122#(or (< (+ thread2Thread1of1ForFork1_~i~1 1) ~N~0) (<= ~N~0 thread2Thread1of1ForFork1_~i~1)), 1312128#(or (<= ~N~0 (+ 6 thread2Thread1of1ForFork1_~i~1)) (< (+ 7 thread2Thread1of1ForFork1_~i~1) ~N~0)), 1312125#(or (< (+ thread2Thread1of1ForFork1_~i~1 4) ~N~0) (<= ~N~0 (+ 3 thread2Thread1of1ForFork1_~i~1))), 1312127#(or (<= ~N~0 (+ 5 thread2Thread1of1ForFork1_~i~1)) (< (+ 6 thread2Thread1of1ForFork1_~i~1) ~N~0)), 1312129#(or (<= ~N~0 6) (< 7 ~N~0)), 1311840#(< thread2Thread1of1ForFork1_~i~1 ~N~0), 1312123#(or (< (+ 2 thread2Thread1of1ForFork1_~i~1) ~N~0) (<= ~N~0 (+ thread2Thread1of1ForFork1_~i~1 1))), 1312126#(or (<= ~N~0 (+ thread2Thread1of1ForFork1_~i~1 4)) (< (+ 5 thread2Thread1of1ForFork1_~i~1) ~N~0)), 1312124#(or (< (+ 3 thread2Thread1of1ForFork1_~i~1) ~N~0) (<= ~N~0 (+ 2 thread2Thread1of1ForFork1_~i~1))), 1312121#(< (+ thread2Thread1of1ForFork1_~i~1 1) ~N~0)] [2022-03-15 19:47:30,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 19:47:30,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:47:30,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 19:47:30,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-03-15 19:47:30,952 INFO L87 Difference]: Start difference. First operand 29120 states and 121082 transitions. Second operand has 27 states, 27 states have (on average 4.185185185185185) internal successors, (113), 26 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:31,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:47:31,996 INFO L93 Difference]: Finished difference Result 38580 states and 153480 transitions. [2022-03-15 19:47:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 19:47:31,996 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.185185185185185) internal successors, (113), 26 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-03-15 19:47:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:47:32,163 INFO L225 Difference]: With dead ends: 38580 [2022-03-15 19:47:32,163 INFO L226 Difference]: Without dead ends: 29122 [2022-03-15 19:47:32,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 523 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=418, Invalid=2132, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 19:47:32,164 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 281 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 19:47:32,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 287 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 19:47:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29122 states. [2022-03-15 19:47:32,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29122 to 29122. [2022-03-15 19:47:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29122 states, 29121 states have (on average 4.157961608461248) internal successors, (121084), 29121 states have internal predecessors, (121084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:32,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29122 states to 29122 states and 121084 transitions. [2022-03-15 19:47:32,989 INFO L78 Accepts]: Start accepts. Automaton has 29122 states and 121084 transitions. Word has length 65 [2022-03-15 19:47:32,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:47:32,989 INFO L470 AbstractCegarLoop]: Abstraction has 29122 states and 121084 transitions. [2022-03-15 19:47:32,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.185185185185185) internal successors, (113), 26 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:32,990 INFO L276 IsEmpty]: Start isEmpty. Operand 29122 states and 121084 transitions. [2022-03-15 19:47:33,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-15 19:47:33,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:47:33,058 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:47:33,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 19:47:33,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:47:33,259 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:47:33,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:47:33,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1658913857, now seen corresponding path program 43 times [2022-03-15 19:47:33,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:47:33,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461373487] [2022-03-15 19:47:33,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:47:33,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:47:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:47:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 21 proven. 34 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-03-15 19:47:33,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:47:33,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461373487] [2022-03-15 19:47:33,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461373487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:47:33,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428225145] [2022-03-15 19:47:33,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 19:47:33,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:47:33,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:47:33,419 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:47:33,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 19:47:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:47:33,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 19:47:33,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:47:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-03-15 19:47:33,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:47:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-03-15 19:47:34,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428225145] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:47:34,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:47:34,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2022-03-15 19:47:34,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [476506014] [2022-03-15 19:47:34,188 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:47:34,207 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:47:34,943 INFO L252 McrAutomatonBuilder]: Finished intersection with 478 states and 1058 transitions. [2022-03-15 19:47:34,943 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:47:39,372 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [1409434#(or (<= (+ 7 thread1Thread1of1ForFork0_~i~0) ~N~0) (<= ~N~0 (+ 5 thread1Thread1of1ForFork0_~i~0))), 1409435#(or (<= 7 ~N~0) (<= ~N~0 5)), 1409433#(or (<= ~N~0 (+ thread1Thread1of1ForFork0_~i~0 4)) (<= (+ 6 thread1Thread1of1ForFork0_~i~0) ~N~0)), 1409430#(or (<= ~N~0 (+ thread1Thread1of1ForFork0_~i~0 1)) (<= (+ 3 thread1Thread1of1ForFork0_~i~0) ~N~0)), 1409432#(or (<= (+ 5 thread1Thread1of1ForFork0_~i~0) ~N~0) (<= ~N~0 (+ 3 thread1Thread1of1ForFork0_~i~0))), 1409429#(or (<= ~N~0 thread1Thread1of1ForFork0_~i~0) (<= (+ 2 thread1Thread1of1ForFork0_~i~0) ~N~0)), 1409431#(or (<= (+ thread1Thread1of1ForFork0_~i~0 4) ~N~0) (<= ~N~0 (+ 2 thread1Thread1of1ForFork0_~i~0)))] [2022-03-15 19:47:39,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 19:47:39,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:47:39,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 19:47:39,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=1634, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 19:47:39,373 INFO L87 Difference]: Start difference. First operand 29122 states and 121084 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 23 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:47:39,930 INFO L93 Difference]: Finished difference Result 32028 states and 133328 transitions. [2022-03-15 19:47:39,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 19:47:39,931 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 23 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-03-15 19:47:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:47:40,026 INFO L225 Difference]: With dead ends: 32028 [2022-03-15 19:47:40,026 INFO L226 Difference]: Without dead ends: 32028 [2022-03-15 19:47:40,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 485 SyntacticMatches, 29 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=2840, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 19:47:40,027 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 528 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:47:40,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 40 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:47:40,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32028 states. [2022-03-15 19:47:40,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32028 to 32028. [2022-03-15 19:47:40,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32028 states, 32027 states have (on average 4.162987479314329) internal successors, (133328), 32027 states have internal predecessors, (133328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32028 states to 32028 states and 133328 transitions. [2022-03-15 19:47:40,885 INFO L78 Accepts]: Start accepts. Automaton has 32028 states and 133328 transitions. Word has length 67 [2022-03-15 19:47:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:47:40,885 INFO L470 AbstractCegarLoop]: Abstraction has 32028 states and 133328 transitions. [2022-03-15 19:47:40,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 23 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:40,885 INFO L276 IsEmpty]: Start isEmpty. Operand 32028 states and 133328 transitions. [2022-03-15 19:47:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-15 19:47:40,952 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:47:40,952 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:47:40,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 19:47:41,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 19:47:41,153 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:47:41,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:47:41,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1888740989, now seen corresponding path program 44 times [2022-03-15 19:47:41,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:47:41,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229502630] [2022-03-15 19:47:41,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:47:41,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:47:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:47:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-15 19:47:41,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:47:41,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229502630] [2022-03-15 19:47:41,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229502630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:47:41,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937279951] [2022-03-15 19:47:41,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:47:41,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:47:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:47:41,316 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:47:41,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 19:47:41,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:47:41,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:47:41,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 19:47:41,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:47:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-15 19:47:42,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:47:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-15 19:47:42,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937279951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:47:42,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:47:42,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2022-03-15 19:47:42,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1126360305] [2022-03-15 19:47:42,388 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:47:42,400 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:47:43,093 INFO L252 McrAutomatonBuilder]: Finished intersection with 510 states and 1136 transitions. [2022-03-15 19:47:43,093 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:47:48,181 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1505991#(and (or (<= 7 ~N~0) (<= ~N~0 thread3Thread1of1ForFork2_~i~2)) (or (= thread3Thread1of1ForFork2_~i~2 0) (<= ~N~0 thread3Thread1of1ForFork2_~i~2))), 1505992#(or (<= 7 ~N~0) (<= ~N~0 0))] [2022-03-15 19:47:48,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 19:47:48,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:47:48,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 19:47:48,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1261, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 19:47:48,182 INFO L87 Difference]: Start difference. First operand 32028 states and 133328 transitions. Second operand has 19 states, 19 states have (on average 7.105263157894737) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:48,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:47:48,833 INFO L93 Difference]: Finished difference Result 42312 states and 177210 transitions. [2022-03-15 19:47:48,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 19:47:48,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.105263157894737) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-03-15 19:47:48,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:47:48,959 INFO L225 Difference]: With dead ends: 42312 [2022-03-15 19:47:48,959 INFO L226 Difference]: Without dead ends: 42096 [2022-03-15 19:47:48,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 529 SyntacticMatches, 23 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=738, Invalid=2342, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 19:47:48,960 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 158 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 19:47:48,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 25 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 19:47:48,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42096 states. [2022-03-15 19:47:49,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42096 to 39864. [2022-03-15 19:47:49,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39864 states, 39863 states have (on average 4.11850588264807) internal successors, (164176), 39863 states have internal predecessors, (164176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39864 states to 39864 states and 164176 transitions. [2022-03-15 19:47:50,007 INFO L78 Accepts]: Start accepts. Automaton has 39864 states and 164176 transitions. Word has length 68 [2022-03-15 19:47:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:47:50,008 INFO L470 AbstractCegarLoop]: Abstraction has 39864 states and 164176 transitions. [2022-03-15 19:47:50,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.105263157894737) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:50,008 INFO L276 IsEmpty]: Start isEmpty. Operand 39864 states and 164176 transitions. [2022-03-15 19:47:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-15 19:47:50,086 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:47:50,086 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:47:50,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 19:47:50,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:47:50,287 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:47:50,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:47:50,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1742110135, now seen corresponding path program 45 times [2022-03-15 19:47:50,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:47:50,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463673590] [2022-03-15 19:47:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:47:50,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:47:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:47:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-15 19:47:50,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:47:50,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463673590] [2022-03-15 19:47:50,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463673590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:47:50,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330932888] [2022-03-15 19:47:50,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:47:50,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:47:50,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:47:50,472 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:47:50,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 19:47:50,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 19:47:50,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:47:50,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:47:50,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:47:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-15 19:47:51,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:47:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-15 19:47:51,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330932888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:47:51,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:47:51,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 23 [2022-03-15 19:47:51,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1754617749] [2022-03-15 19:47:51,204 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:47:51,217 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:47:52,056 INFO L252 McrAutomatonBuilder]: Finished intersection with 562 states and 1260 transitions. [2022-03-15 19:47:52,056 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:47:57,405 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [1628505#(<= thread2Thread1of1ForFork1_~i~1 2), 1628500#(<= ~p~0 6), 1628504#(<= thread2Thread1of1ForFork1_~i~1 3), 1628503#(<= thread2Thread1of1ForFork1_~i~1 4), 1628507#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 1628506#(<= thread2Thread1of1ForFork1_~i~1 1), 1628501#(<= thread2Thread1of1ForFork1_~i~1 6), 1628508#(<= thread2Thread1of1ForFork1_~i~1 0), 1628502#(<= thread2Thread1of1ForFork1_~i~1 5), 1628509#(= thread2Thread1of1ForFork1_~i~1 0)] [2022-03-15 19:47:57,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 19:47:57,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:47:57,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 19:47:57,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 19:47:57,406 INFO L87 Difference]: Start difference. First operand 39864 states and 164176 transitions. Second operand has 28 states, 28 states have (on average 6.678571428571429) internal successors, (187), 28 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:47:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:47:59,344 INFO L93 Difference]: Finished difference Result 56880 states and 234636 transitions. [2022-03-15 19:47:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 19:47:59,344 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.678571428571429) internal successors, (187), 28 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-03-15 19:47:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:47:59,526 INFO L225 Difference]: With dead ends: 56880 [2022-03-15 19:47:59,527 INFO L226 Difference]: Without dead ends: 56364 [2022-03-15 19:47:59,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 665 SyntacticMatches, 28 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5239 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2361, Invalid=9629, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 19:47:59,528 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 561 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 19:47:59,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 105 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 19:47:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56364 states. [2022-03-15 19:48:00,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56364 to 40168. [2022-03-15 19:48:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40168 states, 40167 states have (on average 4.115218960838499) internal successors, (165296), 40167 states have internal predecessors, (165296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:00,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40168 states to 40168 states and 165296 transitions. [2022-03-15 19:48:00,771 INFO L78 Accepts]: Start accepts. Automaton has 40168 states and 165296 transitions. Word has length 70 [2022-03-15 19:48:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:48:00,771 INFO L470 AbstractCegarLoop]: Abstraction has 40168 states and 165296 transitions. [2022-03-15 19:48:00,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.678571428571429) internal successors, (187), 28 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:00,772 INFO L276 IsEmpty]: Start isEmpty. Operand 40168 states and 165296 transitions. [2022-03-15 19:48:00,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-15 19:48:00,852 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:48:00,852 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:48:00,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 19:48:01,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-15 19:48:01,052 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:48:01,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:48:01,053 INFO L85 PathProgramCache]: Analyzing trace with hash -353529805, now seen corresponding path program 46 times [2022-03-15 19:48:01,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:48:01,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185955124] [2022-03-15 19:48:01,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:48:01,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:48:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:48:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-15 19:48:01,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:48:01,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185955124] [2022-03-15 19:48:01,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185955124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:48:01,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478836742] [2022-03-15 19:48:01,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 19:48:01,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:48:01,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:48:01,236 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:48:01,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 19:48:02,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 19:48:02,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:48:02,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:48:02,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:48:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-03-15 19:48:02,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:48:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-03-15 19:48:02,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478836742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:48:02,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:48:02,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 23 [2022-03-15 19:48:02,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2024205897] [2022-03-15 19:48:02,561 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:48:02,769 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:48:03,511 INFO L252 McrAutomatonBuilder]: Finished intersection with 536 states and 1187 transitions. [2022-03-15 19:48:03,511 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:48:08,558 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [1766402#(<= thread2Thread1of1ForFork1_~i~1 0), 1766400#(<= thread2Thread1of1ForFork1_~i~1 1), 1766399#(<= thread2Thread1of1ForFork1_~i~1 2), 1766401#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 1766398#(<= thread2Thread1of1ForFork1_~i~1 3), 1766396#(<= thread2Thread1of1ForFork1_~i~1 5), 1766397#(<= thread2Thread1of1ForFork1_~i~1 4), 1766394#(<= thread2Thread1of1ForFork1_~i~1 6), 1766403#(= thread2Thread1of1ForFork1_~i~1 0), 1766395#(or (<= ~p~0 (+ 6 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0))] [2022-03-15 19:48:08,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 19:48:08,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:48:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 19:48:08,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 19:48:08,559 INFO L87 Difference]: Start difference. First operand 40168 states and 165296 transitions. Second operand has 28 states, 28 states have (on average 6.571428571428571) internal successors, (184), 28 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:48:10,562 INFO L93 Difference]: Finished difference Result 60602 states and 248966 transitions. [2022-03-15 19:48:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-15 19:48:10,562 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.571428571428571) internal successors, (184), 28 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-03-15 19:48:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:48:10,762 INFO L225 Difference]: With dead ends: 60602 [2022-03-15 19:48:10,762 INFO L226 Difference]: Without dead ends: 60178 [2022-03-15 19:48:10,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 635 SyntacticMatches, 28 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4891 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2326, Invalid=8804, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 19:48:10,763 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 670 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 19:48:10,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 122 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 19:48:10,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60178 states. [2022-03-15 19:48:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60178 to 41284. [2022-03-15 19:48:11,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41284 states, 41283 states have (on average 4.1053218031635295) internal successors, (169480), 41283 states have internal predecessors, (169480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:12,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41284 states to 41284 states and 169480 transitions. [2022-03-15 19:48:12,037 INFO L78 Accepts]: Start accepts. Automaton has 41284 states and 169480 transitions. Word has length 70 [2022-03-15 19:48:12,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:48:12,037 INFO L470 AbstractCegarLoop]: Abstraction has 41284 states and 169480 transitions. [2022-03-15 19:48:12,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.571428571428571) internal successors, (184), 28 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:12,037 INFO L276 IsEmpty]: Start isEmpty. Operand 41284 states and 169480 transitions. [2022-03-15 19:48:12,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-15 19:48:12,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:48:12,373 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:48:12,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 19:48:12,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-15 19:48:12,587 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:48:12,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:48:12,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1537245043, now seen corresponding path program 47 times [2022-03-15 19:48:12,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:48:12,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244847323] [2022-03-15 19:48:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:48:12,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:48:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:48:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 23 proven. 75 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-15 19:48:12,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:48:12,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244847323] [2022-03-15 19:48:12,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244847323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:48:12,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468123576] [2022-03-15 19:48:12,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 19:48:12,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:48:12,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:48:12,785 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:48:12,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 19:48:15,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 19:48:15,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:48:15,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 19:48:15,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:48:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-15 19:48:15,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:48:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-15 19:48:15,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468123576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:48:15,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:48:15,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 16] total 40 [2022-03-15 19:48:15,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [484674711] [2022-03-15 19:48:15,777 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:48:15,789 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:48:16,612 INFO L252 McrAutomatonBuilder]: Finished intersection with 508 states and 1109 transitions. [2022-03-15 19:48:16,612 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:48:21,431 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [1910248#(<= thread2Thread1of1ForFork1_~i~1 6), 1910249#(<= thread2Thread1of1ForFork1_~i~1 5), 1910254#(<= thread2Thread1of1ForFork1_~i~1 0), 1910252#(<= thread2Thread1of1ForFork1_~i~1 2), 1910251#(<= thread2Thread1of1ForFork1_~i~1 3), 1910250#(<= thread2Thread1of1ForFork1_~i~1 4), 1910253#(<= thread2Thread1of1ForFork1_~i~1 1), 1910255#(or (<= ~p~0 (+ 5 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 1910256#(= thread2Thread1of1ForFork1_~i~1 0), 1910247#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0))] [2022-03-15 19:48:21,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 19:48:21,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:48:21,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 19:48:21,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2001, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 19:48:21,432 INFO L87 Difference]: Start difference. First operand 41284 states and 169480 transitions. Second operand has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:23,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:48:23,945 INFO L93 Difference]: Finished difference Result 102852 states and 421986 transitions. [2022-03-15 19:48:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-15 19:48:23,945 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-03-15 19:48:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:48:24,631 INFO L225 Difference]: With dead ends: 102852 [2022-03-15 19:48:24,631 INFO L226 Difference]: Without dead ends: 101792 [2022-03-15 19:48:24,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 603 SyntacticMatches, 28 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9663 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3331, Invalid=15029, Unknown=0, NotChecked=0, Total=18360 [2022-03-15 19:48:24,633 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 834 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 19:48:24,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 126 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 19:48:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101792 states. [2022-03-15 19:48:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101792 to 43500. [2022-03-15 19:48:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43500 states, 43499 states have (on average 4.118899285041035) internal successors, (179168), 43499 states have internal predecessors, (179168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:26,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43500 states to 43500 states and 179168 transitions. [2022-03-15 19:48:26,633 INFO L78 Accepts]: Start accepts. Automaton has 43500 states and 179168 transitions. Word has length 70 [2022-03-15 19:48:26,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:48:26,633 INFO L470 AbstractCegarLoop]: Abstraction has 43500 states and 179168 transitions. [2022-03-15 19:48:26,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:26,633 INFO L276 IsEmpty]: Start isEmpty. Operand 43500 states and 179168 transitions. [2022-03-15 19:48:26,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-15 19:48:26,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:48:26,721 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:48:26,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 19:48:26,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:48:26,922 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:48:26,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:48:26,922 INFO L85 PathProgramCache]: Analyzing trace with hash -20562253, now seen corresponding path program 48 times [2022-03-15 19:48:26,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:48:26,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651591963] [2022-03-15 19:48:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:48:26,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:48:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:48:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-15 19:48:27,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:48:27,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651591963] [2022-03-15 19:48:27,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651591963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:48:27,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521905758] [2022-03-15 19:48:27,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 19:48:27,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:48:27,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:48:27,087 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:48:27,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 19:48:27,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 19:48:27,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:48:27,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:48:27,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:48:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-15 19:48:27,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:48:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-15 19:48:27,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521905758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:48:27,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:48:27,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 23 [2022-03-15 19:48:27,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [758139844] [2022-03-15 19:48:27,989 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:48:28,001 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:48:28,725 INFO L252 McrAutomatonBuilder]: Finished intersection with 480 states and 1031 transitions. [2022-03-15 19:48:28,725 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:48:32,926 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [2100806#(<= thread2Thread1of1ForFork1_~i~1 5), 2100809#(<= thread2Thread1of1ForFork1_~i~1 2), 2100812#(<= thread2Thread1of1ForFork1_~i~1 0), 2100811#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 2100808#(<= thread2Thread1of1ForFork1_~i~1 3), 2100805#(<= thread2Thread1of1ForFork1_~i~1 6), 2100807#(<= thread2Thread1of1ForFork1_~i~1 4), 2100810#(<= thread2Thread1of1ForFork1_~i~1 1), 2100813#(= thread2Thread1of1ForFork1_~i~1 0), 2100804#(or (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0) (<= ~p~0 (+ thread3Thread1of1ForFork2_~i~2 4)))] [2022-03-15 19:48:32,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 19:48:32,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:48:32,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 19:48:32,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 19:48:32,927 INFO L87 Difference]: Start difference. First operand 43500 states and 179168 transitions. Second operand has 28 states, 28 states have (on average 6.357142857142857) internal successors, (178), 28 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:35,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:48:35,439 INFO L93 Difference]: Finished difference Result 89040 states and 364050 transitions. [2022-03-15 19:48:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-15 19:48:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.357142857142857) internal successors, (178), 28 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-03-15 19:48:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:48:35,775 INFO L225 Difference]: With dead ends: 89040 [2022-03-15 19:48:35,775 INFO L226 Difference]: Without dead ends: 88112 [2022-03-15 19:48:35,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 589 SyntacticMatches, 29 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6083 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2770, Invalid=10802, Unknown=0, NotChecked=0, Total=13572 [2022-03-15 19:48:35,776 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 755 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 19:48:35,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 137 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 19:48:35,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88112 states. [2022-03-15 19:48:37,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88112 to 46404. [2022-03-15 19:48:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46404 states, 46403 states have (on average 4.1290002801543) internal successors, (191598), 46403 states have internal predecessors, (191598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:37,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46404 states to 46404 states and 191598 transitions. [2022-03-15 19:48:37,579 INFO L78 Accepts]: Start accepts. Automaton has 46404 states and 191598 transitions. Word has length 70 [2022-03-15 19:48:37,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:48:37,579 INFO L470 AbstractCegarLoop]: Abstraction has 46404 states and 191598 transitions. [2022-03-15 19:48:37,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.357142857142857) internal successors, (178), 28 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:37,579 INFO L276 IsEmpty]: Start isEmpty. Operand 46404 states and 191598 transitions. [2022-03-15 19:48:37,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-15 19:48:37,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:48:37,677 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:48:37,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 19:48:37,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-15 19:48:37,878 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:48:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:48:37,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1926417907, now seen corresponding path program 49 times [2022-03-15 19:48:37,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:48:37,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302899368] [2022-03-15 19:48:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:48:37,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:48:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:48:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 17 proven. 81 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-15 19:48:38,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:48:38,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302899368] [2022-03-15 19:48:38,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302899368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:48:38,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398727490] [2022-03-15 19:48:38,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 19:48:38,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:48:38,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:48:38,368 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:48:38,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 19:48:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:48:38,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 19:48:38,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:48:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 23 proven. 75 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-15 19:48:39,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:48:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-15 19:48:39,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398727490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:48:39,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:48:39,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 14] total 38 [2022-03-15 19:48:39,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1628592031] [2022-03-15 19:48:39,338 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:48:39,351 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:48:40,046 INFO L252 McrAutomatonBuilder]: Finished intersection with 452 states and 953 transitions. [2022-03-15 19:48:40,046 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:48:44,007 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [2283372#(<= thread2Thread1of1ForFork1_~i~1 2), 2283375#(= thread2Thread1of1ForFork1_~i~1 0), 2283366#(or (<= ~p~0 (+ 3 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0)), 2283374#(<= thread2Thread1of1ForFork1_~i~1 0), 2283373#(<= thread2Thread1of1ForFork1_~i~1 1), 2283368#(<= thread2Thread1of1ForFork1_~i~1 5), 2283369#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 2283367#(<= thread2Thread1of1ForFork1_~i~1 6), 2283370#(<= thread2Thread1of1ForFork1_~i~1 4), 2283371#(<= thread2Thread1of1ForFork1_~i~1 3)] [2022-03-15 19:48:44,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 19:48:44,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:48:44,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 19:48:44,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=1820, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 19:48:44,008 INFO L87 Difference]: Start difference. First operand 46404 states and 191598 transitions. Second operand has 28 states, 28 states have (on average 6.25) internal successors, (175), 28 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:46,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:48:46,669 INFO L93 Difference]: Finished difference Result 91122 states and 374572 transitions. [2022-03-15 19:48:46,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-15 19:48:46,670 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.25) internal successors, (175), 28 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-03-15 19:48:46,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:48:47,009 INFO L225 Difference]: With dead ends: 91122 [2022-03-15 19:48:47,010 INFO L226 Difference]: Without dead ends: 90134 [2022-03-15 19:48:47,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 547 SyntacticMatches, 28 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8809 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3209, Invalid=14083, Unknown=0, NotChecked=0, Total=17292 [2022-03-15 19:48:47,011 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 676 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 19:48:47,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 148 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 19:48:47,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90134 states. [2022-03-15 19:48:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90134 to 53664. [2022-03-15 19:48:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53664 states, 53663 states have (on average 4.143935299927324) internal successors, (222376), 53663 states have internal predecessors, (222376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53664 states to 53664 states and 222376 transitions. [2022-03-15 19:48:49,329 INFO L78 Accepts]: Start accepts. Automaton has 53664 states and 222376 transitions. Word has length 70 [2022-03-15 19:48:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:48:49,329 INFO L470 AbstractCegarLoop]: Abstraction has 53664 states and 222376 transitions. [2022-03-15 19:48:49,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.25) internal successors, (175), 28 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:49,329 INFO L276 IsEmpty]: Start isEmpty. Operand 53664 states and 222376 transitions. [2022-03-15 19:48:49,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-15 19:48:49,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:48:49,478 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:48:49,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 19:48:49,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-15 19:48:49,678 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:48:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:48:49,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1664757043, now seen corresponding path program 50 times [2022-03-15 19:48:49,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:48:49,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572881730] [2022-03-15 19:48:49,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:48:49,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:48:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:48:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-15 19:48:49,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:48:49,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572881730] [2022-03-15 19:48:49,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572881730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:48:49,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834086840] [2022-03-15 19:48:49,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 19:48:49,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:48:49,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:48:49,868 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:48:49,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 19:48:50,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 19:48:50,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:48:50,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 19:48:50,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:48:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 28 proven. 70 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-15 19:48:50,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:48:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-15 19:48:50,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834086840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:48:50,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:48:50,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 13] total 36 [2022-03-15 19:48:50,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1359562064] [2022-03-15 19:48:50,653 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:48:50,665 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 19:48:51,506 INFO L252 McrAutomatonBuilder]: Finished intersection with 424 states and 875 transitions. [2022-03-15 19:48:51,506 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 19:48:55,002 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [2482532#(<= thread2Thread1of1ForFork1_~i~1 4), 2482534#(<= thread2Thread1of1ForFork1_~i~1 2), 2482530#(<= thread2Thread1of1ForFork1_~i~1 6), 2482533#(<= thread2Thread1of1ForFork1_~i~1 3), 2482536#(<= thread2Thread1of1ForFork1_~i~1 0), 2482537#(= thread2Thread1of1ForFork1_~i~1 0), 2482529#(and (= thread3Thread1of1ForFork2_~i~2 0) (<= thread2Thread1of1ForFork1_~i~1 0)), 2482531#(<= thread2Thread1of1ForFork1_~i~1 5), 2482535#(<= thread2Thread1of1ForFork1_~i~1 1), 2482528#(or (<= ~p~0 (+ 2 thread3Thread1of1ForFork2_~i~2)) (= (mod thread3Thread1of1ForFork2_~cond~0 256) 0))] [2022-03-15 19:48:55,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 19:48:55,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 19:48:55,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 19:48:55,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=1638, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 19:48:55,003 INFO L87 Difference]: Start difference. First operand 53664 states and 222376 transitions. Second operand has 28 states, 28 states have (on average 6.142857142857143) internal successors, (172), 28 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:48:57,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 19:48:57,565 INFO L93 Difference]: Finished difference Result 91602 states and 379616 transitions. [2022-03-15 19:48:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-15 19:48:57,566 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.142857142857143) internal successors, (172), 28 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-03-15 19:48:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 19:48:58,225 INFO L225 Difference]: With dead ends: 91602 [2022-03-15 19:48:58,225 INFO L226 Difference]: Without dead ends: 90598 [2022-03-15 19:48:58,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 518 SyntacticMatches, 29 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8324 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3017, Invalid=13239, Unknown=0, NotChecked=0, Total=16256 [2022-03-15 19:48:58,226 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 536 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 19:48:58,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 162 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 19:48:58,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90598 states. [2022-03-15 19:48:59,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90598 to 48296. [2022-03-15 19:48:59,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48296 states, 48295 states have (on average 4.123987990475205) internal successors, (199168), 48295 states have internal predecessors, (199168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:49:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48296 states to 48296 states and 199168 transitions. [2022-03-15 19:49:00,351 INFO L78 Accepts]: Start accepts. Automaton has 48296 states and 199168 transitions. Word has length 70 [2022-03-15 19:49:00,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 19:49:00,352 INFO L470 AbstractCegarLoop]: Abstraction has 48296 states and 199168 transitions. [2022-03-15 19:49:00,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.142857142857143) internal successors, (172), 28 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 19:49:00,352 INFO L276 IsEmpty]: Start isEmpty. Operand 48296 states and 199168 transitions. [2022-03-15 19:49:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-15 19:49:00,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 19:49:00,480 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 19:49:00,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-15 19:49:00,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:49:00,681 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 19:49:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 19:49:00,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2067537025, now seen corresponding path program 51 times [2022-03-15 19:49:00,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 19:49:00,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076658093] [2022-03-15 19:49:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 19:49:00,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 19:49:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 19:49:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-15 19:49:00,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 19:49:00,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076658093] [2022-03-15 19:49:00,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076658093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 19:49:00,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065440666] [2022-03-15 19:49:00,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 19:49:00,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 19:49:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 19:49:00,872 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 19:49:00,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 19:49:01,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 19:49:01,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 19:49:01,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 19:49:01,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 19:49:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-03-15 19:49:01,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 19:49:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-03-15 19:49:01,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065440666] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 19:49:01,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 19:49:01,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 23 [2022-03-15 19:49:01,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1511030726] [2022-03-15 19:49:01,522 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 19:49:01,534 INFO L249 McrAutomatonBuilder]: Started intersection.