/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/stateful_check.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:06:06,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:06:06,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:06:06,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:06:06,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:06:06,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:06:06,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:06:06,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:06:06,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:06:06,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:06:06,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:06:06,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:06:06,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:06:06,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:06:06,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:06:06,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:06:06,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:06:06,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:06:06,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:06:06,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:06:06,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:06:06,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:06:06,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:06:06,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:06:06,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 18:06:06,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 18:06:06,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 18:06:06,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 18:06:06,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 18:06:06,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 18:06:06,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 18:06:06,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 18:06:06,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 18:06:06,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 18:06:06,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 18:06:06,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 18:06:06,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 18:06:06,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 18:06:06,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:06:06,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:06:06,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:06:06,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:06:06,360 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:06:06,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:06:06,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:06:06,365 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:06:06,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:06:06,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:06:06,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:06:06,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:06:06,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:06:06,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:06:06,367 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:06:06,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:06:06,368 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:06:06,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:06:06,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:06:06,368 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:06:06,368 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:06:06,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:06:06,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:06:06,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:06:06,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:06:06,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:06:06,370 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:06:06,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:06:06,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:06:06,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:06:06,846 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:06:06,847 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:06:06,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/stateful_check.c [2021-02-23 18:06:06,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a157b2101/db2732a6dfdd4ed09b2b942cf6047ff0/FLAGdced3f51a [2021-02-23 18:06:07,542 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:06:07,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/stateful_check.c [2021-02-23 18:06:07,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a157b2101/db2732a6dfdd4ed09b2b942cf6047ff0/FLAGdced3f51a [2021-02-23 18:06:07,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a157b2101/db2732a6dfdd4ed09b2b942cf6047ff0 [2021-02-23 18:06:07,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:06:07,929 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:06:07,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:06:07,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:06:07,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:06:07,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:06:07" (1/1) ... [2021-02-23 18:06:07,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb5f047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:07, skipping insertion in model container [2021-02-23 18:06:07,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:06:07" (1/1) ... [2021-02-23 18:06:07,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:06:07,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:06:08,101 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/stateful_check.c[298,311] [2021-02-23 18:06:08,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:06:08,143 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:06:08,156 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/stateful_check.c[298,311] [2021-02-23 18:06:08,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:06:08,184 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:06:08,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:08 WrapperNode [2021-02-23 18:06:08,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:06:08,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:06:08,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:06:08,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:06:08,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:08" (1/1) ... [2021-02-23 18:06:08,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:08" (1/1) ... [2021-02-23 18:06:08,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:08" (1/1) ... [2021-02-23 18:06:08,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:08" (1/1) ... [2021-02-23 18:06:08,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:08" (1/1) ... [2021-02-23 18:06:08,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:08" (1/1) ... [2021-02-23 18:06:08,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:08" (1/1) ... [2021-02-23 18:06:08,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:06:08,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:06:08,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:06:08,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:06:08,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:06:08,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:06:08,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:06:08,368 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:06:08,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-02-23 18:06:08,368 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-02-23 18:06:08,368 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-02-23 18:06:08,368 INFO L138 BoogieDeclarations]: Found implementation of procedure check_final_state [2021-02-23 18:06:08,369 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_release [2021-02-23 18:06:08,369 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_llseek [2021-02-23 18:06:08,370 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_read [2021-02-23 18:06:08,370 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_open [2021-02-23 18:06:08,370 INFO L138 BoogieDeclarations]: Found implementation of procedure my_init [2021-02-23 18:06:08,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:06:08,371 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:06:08,372 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:06:08,372 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:06:08,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:06:08,373 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-02-23 18:06:08,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:06:08,374 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-02-23 18:06:08,377 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-02-23 18:06:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure check_final_state [2021-02-23 18:06:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure misc_release [2021-02-23 18:06:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure misc_llseek [2021-02-23 18:06:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure misc_read [2021-02-23 18:06:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure misc_open [2021-02-23 18:06:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure my_init [2021-02-23 18:06:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:06:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:06:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:06:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:06:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:06:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:06:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:06:09,157 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:06:09,157 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 18:06:09,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:06:09 BoogieIcfgContainer [2021-02-23 18:06:09,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:06:09,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:06:09,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:06:09,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:06:09,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:06:07" (1/3) ... [2021-02-23 18:06:09,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a75219f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:06:09, skipping insertion in model container [2021-02-23 18:06:09,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:08" (2/3) ... [2021-02-23 18:06:09,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a75219f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:06:09, skipping insertion in model container [2021-02-23 18:06:09,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:06:09" (3/3) ... [2021-02-23 18:06:09,168 INFO L111 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2021-02-23 18:06:09,175 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:06:09,181 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:06:09,203 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:06:09,228 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:06:09,228 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:06:09,228 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:06:09,228 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:06:09,228 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:06:09,229 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:06:09,229 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:06:09,229 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:06:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states. [2021-02-23 18:06:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 18:06:09,259 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:06:09,260 INFO L422 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] [2021-02-23 18:06:09,260 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:06:09,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:06:09,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1510621862, now seen corresponding path program 1 times [2021-02-23 18:06:09,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:06:09,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803787597] [2021-02-23 18:06:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:06:09,360 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:06:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:09,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:09,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:09,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:09,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:09,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:06:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:09,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:09,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:09,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 18:06:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:09,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:09,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:06:09,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803787597] [2021-02-23 18:06:09,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:06:09,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:06:09,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338871235] [2021-02-23 18:06:09,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:06:09,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:06:09,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:06:09,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:06:09,674 INFO L87 Difference]: Start difference. First operand 114 states. Second operand 4 states. [2021-02-23 18:06:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:06:10,169 INFO L93 Difference]: Finished difference Result 208 states and 253 transitions. [2021-02-23 18:06:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:06:10,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-23 18:06:10,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:06:10,184 INFO L225 Difference]: With dead ends: 208 [2021-02-23 18:06:10,184 INFO L226 Difference]: Without dead ends: 109 [2021-02-23 18:06:10,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:06:10,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-02-23 18:06:10,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2021-02-23 18:06:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-02-23 18:06:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2021-02-23 18:06:10,281 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 27 [2021-02-23 18:06:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:06:10,282 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2021-02-23 18:06:10,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:06:10,283 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2021-02-23 18:06:10,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-23 18:06:10,286 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:06:10,288 INFO L422 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, 1] [2021-02-23 18:06:10,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:06:10,289 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:06:10,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:06:10,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1907990770, now seen corresponding path program 1 times [2021-02-23 18:06:10,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:06:10,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62510487] [2021-02-23 18:06:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:06:10,304 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:06:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:10,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:10,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:10,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:10,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:10,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:10,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:10,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:06:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:10,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:10,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:10,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:10,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:06:10,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 18:06:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:10,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:10,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:06:10,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62510487] [2021-02-23 18:06:10,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:06:10,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 18:06:10,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728608416] [2021-02-23 18:06:10,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 18:06:10,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:06:10,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 18:06:10,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:06:10,556 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand 5 states. [2021-02-23 18:06:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:06:10,976 INFO L93 Difference]: Finished difference Result 179 states and 210 transitions. [2021-02-23 18:06:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:06:10,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2021-02-23 18:06:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:06:10,981 INFO L225 Difference]: With dead ends: 179 [2021-02-23 18:06:10,981 INFO L226 Difference]: Without dead ends: 172 [2021-02-23 18:06:10,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:06:10,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-02-23 18:06:11,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2021-02-23 18:06:11,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2021-02-23 18:06:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 198 transitions. [2021-02-23 18:06:11,018 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 198 transitions. Word has length 29 [2021-02-23 18:06:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:06:11,018 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 198 transitions. [2021-02-23 18:06:11,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 18:06:11,018 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 198 transitions. [2021-02-23 18:06:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-23 18:06:11,020 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:06:11,021 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:06:11,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:06:11,021 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:06:11,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:06:11,022 INFO L82 PathProgramCache]: Analyzing trace with hash 843041052, now seen corresponding path program 1 times [2021-02-23 18:06:11,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:06:11,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360780695] [2021-02-23 18:06:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:06:11,025 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:06:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:11,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:11,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:11,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:11,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:06:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:11,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:11,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 18:06:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:11,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:11,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-02-23 18:06:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:11,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:06:11,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360780695] [2021-02-23 18:06:11,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:06:11,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:06:11,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458115728] [2021-02-23 18:06:11,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:06:11,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:06:11,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:06:11,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:06:11,201 INFO L87 Difference]: Start difference. First operand 168 states and 198 transitions. Second operand 6 states. [2021-02-23 18:06:11,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:06:11,520 INFO L93 Difference]: Finished difference Result 419 states and 522 transitions. [2021-02-23 18:06:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 18:06:11,521 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-02-23 18:06:11,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:06:11,524 INFO L225 Difference]: With dead ends: 419 [2021-02-23 18:06:11,525 INFO L226 Difference]: Without dead ends: 273 [2021-02-23 18:06:11,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-23 18:06:11,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-02-23 18:06:11,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 208. [2021-02-23 18:06:11,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2021-02-23 18:06:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 249 transitions. [2021-02-23 18:06:11,578 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 249 transitions. Word has length 46 [2021-02-23 18:06:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:06:11,579 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 249 transitions. [2021-02-23 18:06:11,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:06:11,579 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 249 transitions. [2021-02-23 18:06:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-02-23 18:06:11,590 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:06:11,590 INFO L422 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, 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, 1, 1, 1, 1, 1, 1] [2021-02-23 18:06:11,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:06:11,591 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:06:11,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:06:11,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1649941128, now seen corresponding path program 1 times [2021-02-23 18:06:11,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:06:11,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190127734] [2021-02-23 18:06:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:06:11,639 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:06:11,644 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:06:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:11,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:11,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:11,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:11,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:11,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:11,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:06:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:11,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:11,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 18:06:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:11,789 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:11,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 18:06:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:11,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:11,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-23 18:06:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:11,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:11,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:06:11,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190127734] [2021-02-23 18:06:11,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:06:11,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 18:06:11,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849360539] [2021-02-23 18:06:11,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 18:06:11,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:06:11,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 18:06:11,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-23 18:06:11,816 INFO L87 Difference]: Start difference. First operand 208 states and 249 transitions. Second operand 8 states. [2021-02-23 18:06:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:06:12,372 INFO L93 Difference]: Finished difference Result 521 states and 651 transitions. [2021-02-23 18:06:12,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-23 18:06:12,373 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2021-02-23 18:06:12,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:06:12,377 INFO L225 Difference]: With dead ends: 521 [2021-02-23 18:06:12,377 INFO L226 Difference]: Without dead ends: 335 [2021-02-23 18:06:12,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-02-23 18:06:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-02-23 18:06:12,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 248. [2021-02-23 18:06:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2021-02-23 18:06:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 304 transitions. [2021-02-23 18:06:12,412 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 304 transitions. Word has length 67 [2021-02-23 18:06:12,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:06:12,413 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 304 transitions. [2021-02-23 18:06:12,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 18:06:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 304 transitions. [2021-02-23 18:06:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-02-23 18:06:12,414 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:06:12,415 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:06:12,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:06:12,415 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:06:12,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:06:12,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1080587144, now seen corresponding path program 1 times [2021-02-23 18:06:12,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:06:12,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344717915] [2021-02-23 18:06:12,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:06:12,451 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:06:12,452 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:06:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:12,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:12,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:12,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:12,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:12,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:12,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:12,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:12,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:12,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:12,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:12,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:06:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:12,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:12,585 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:12,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 18:06:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:12,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:12,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:12,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 18:06:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:12,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:12,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:12,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-02-23 18:06:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:12,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:12,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:12,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-02-23 18:06:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:12,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:12,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:06:12,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344717915] [2021-02-23 18:06:12,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:06:12,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:06:12,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425749598] [2021-02-23 18:06:12,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:06:12,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:06:12,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:06:12,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:06:12,634 INFO L87 Difference]: Start difference. First operand 248 states and 304 transitions. Second operand 6 states. [2021-02-23 18:06:13,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:06:13,259 INFO L93 Difference]: Finished difference Result 860 states and 1094 transitions. [2021-02-23 18:06:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 18:06:13,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2021-02-23 18:06:13,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:06:13,265 INFO L225 Difference]: With dead ends: 860 [2021-02-23 18:06:13,266 INFO L226 Difference]: Without dead ends: 634 [2021-02-23 18:06:13,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-23 18:06:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-02-23 18:06:13,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 401. [2021-02-23 18:06:13,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2021-02-23 18:06:13,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 497 transitions. [2021-02-23 18:06:13,343 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 497 transitions. Word has length 87 [2021-02-23 18:06:13,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:06:13,344 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 497 transitions. [2021-02-23 18:06:13,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:06:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 497 transitions. [2021-02-23 18:06:13,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-23 18:06:13,347 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:06:13,348 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:06:13,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 18:06:13,348 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:06:13,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:06:13,349 INFO L82 PathProgramCache]: Analyzing trace with hash 419074158, now seen corresponding path program 1 times [2021-02-23 18:06:13,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:06:13,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392689769] [2021-02-23 18:06:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:06:13,396 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:06:13,398 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:06:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:13,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:13,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:13,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:13,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:13,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:13,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:13,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:13,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:13,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:06:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:13,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:13,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:13,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 18:06:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:13,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:13,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:13,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 18:06:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:13,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:13,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:13,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:13,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:06:13,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-02-23 18:06:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:13,550 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:13,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:13,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-02-23 18:06:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:13,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:13,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:06:13,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392689769] [2021-02-23 18:06:13,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:06:13,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:06:13,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730761824] [2021-02-23 18:06:13,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:06:13,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:06:13,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:06:13,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:06:13,583 INFO L87 Difference]: Start difference. First operand 401 states and 497 transitions. Second operand 6 states. [2021-02-23 18:06:14,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:06:14,115 INFO L93 Difference]: Finished difference Result 935 states and 1172 transitions. [2021-02-23 18:06:14,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 18:06:14,115 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2021-02-23 18:06:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:06:14,120 INFO L225 Difference]: With dead ends: 935 [2021-02-23 18:06:14,120 INFO L226 Difference]: Without dead ends: 556 [2021-02-23 18:06:14,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:06:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-02-23 18:06:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 407. [2021-02-23 18:06:14,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2021-02-23 18:06:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 497 transitions. [2021-02-23 18:06:14,184 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 497 transitions. Word has length 88 [2021-02-23 18:06:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:06:14,185 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 497 transitions. [2021-02-23 18:06:14,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:06:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 497 transitions. [2021-02-23 18:06:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-02-23 18:06:14,186 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:06:14,186 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:06:14,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 18:06:14,187 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:06:14,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:06:14,187 INFO L82 PathProgramCache]: Analyzing trace with hash -699194828, now seen corresponding path program 1 times [2021-02-23 18:06:14,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:06:14,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468415639] [2021-02-23 18:06:14,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:06:14,240 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:06:14,244 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:06:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:14,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:14,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:14,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:14,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:14,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:14,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:14,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:14,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:14,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:14,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:14,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:06:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:14,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:14,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:14,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 18:06:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:14,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:14,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:14,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 18:06:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:14,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:14,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:14,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-02-23 18:06:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:14,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:14,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:14,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-02-23 18:06:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:14,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:14,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:06:14,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468415639] [2021-02-23 18:06:14,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:06:14,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 18:06:14,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97576611] [2021-02-23 18:06:14,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 18:06:14,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:06:14,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 18:06:14,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-23 18:06:14,372 INFO L87 Difference]: Start difference. First operand 407 states and 497 transitions. Second operand 8 states. [2021-02-23 18:06:14,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:06:14,969 INFO L93 Difference]: Finished difference Result 1178 states and 1517 transitions. [2021-02-23 18:06:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-23 18:06:14,970 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 87 [2021-02-23 18:06:14,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:06:14,975 INFO L225 Difference]: With dead ends: 1178 [2021-02-23 18:06:14,975 INFO L226 Difference]: Without dead ends: 793 [2021-02-23 18:06:14,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-02-23 18:06:14,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-02-23 18:06:15,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 487. [2021-02-23 18:06:15,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2021-02-23 18:06:15,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 611 transitions. [2021-02-23 18:06:15,048 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 611 transitions. Word has length 87 [2021-02-23 18:06:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:06:15,048 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 611 transitions. [2021-02-23 18:06:15,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 18:06:15,048 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 611 transitions. [2021-02-23 18:06:15,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-02-23 18:06:15,050 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:06:15,050 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:06:15,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 18:06:15,050 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:06:15,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:06:15,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2120170501, now seen corresponding path program 1 times [2021-02-23 18:06:15,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:06:15,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793628511] [2021-02-23 18:06:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:06:15,112 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:06:15,114 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:06:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:06:15,131 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:06:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:06:15,146 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:06:15,185 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:06:15,185 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:06:15,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 18:06:15,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:06:15 BoogieIcfgContainer [2021-02-23 18:06:15,216 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:06:15,218 INFO L168 Benchmark]: Toolchain (without parser) took 7298.15 ms. Allocated memory was 159.4 MB in the beginning and 244.3 MB in the end (delta: 84.9 MB). Free memory was 135.0 MB in the beginning and 171.2 MB in the end (delta: -36.2 MB). Peak memory consumption was 49.8 MB. Max. memory is 8.0 GB. [2021-02-23 18:06:15,219 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 159.4 MB. Free memory is still 132.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:06:15,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.17 ms. Allocated memory is still 159.4 MB. Free memory was 134.0 MB in the beginning and 123.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 18:06:15,220 INFO L168 Benchmark]: Boogie Preprocessor took 54.23 ms. Allocated memory is still 159.4 MB. Free memory was 123.8 MB in the beginning and 122.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:06:15,221 INFO L168 Benchmark]: RCFGBuilder took 918.28 ms. Allocated memory is still 159.4 MB. Free memory was 122.1 MB in the beginning and 133.3 MB in the end (delta: -11.1 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:06:15,221 INFO L168 Benchmark]: TraceAbstraction took 6055.21 ms. Allocated memory was 159.4 MB in the beginning and 244.3 MB in the end (delta: 84.9 MB). Free memory was 132.7 MB in the beginning and 171.2 MB in the end (delta: -38.4 MB). Peak memory consumption was 47.5 MB. Max. memory is 8.0 GB. [2021-02-23 18:06:15,224 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 159.4 MB. Free memory is still 132.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.17 ms. Allocated memory is still 159.4 MB. Free memory was 134.0 MB in the beginning and 123.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 54.23 ms. Allocated memory is still 159.4 MB. Free memory was 123.8 MB in the beginning and 122.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 918.28 ms. Allocated memory is still 159.4 MB. Free memory was 122.1 MB in the beginning and 133.3 MB in the end (delta: -11.1 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6055.21 ms. Allocated memory was 159.4 MB in the beginning and 244.3 MB in the end (delta: 84.9 MB). Free memory was 132.7 MB in the beginning and 171.2 MB in the end (delta: -38.4 MB). Peak memory consumption was 47.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L11] int ldv_mutex = 1; [L13] int open_called = 0; [L76] int ldv_s_misc_fops_file_operations = 0; [L77] CALL my_init() [L71] open_called = 0 [L72] return 0; [L77] RET my_init() [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L83] COND TRUE ldv_s_misc_fops_file_operations==0 [L84] CALL misc_open() [L59] COND TRUE __VERIFIER_nondet_int() [L61] return 1; [L84] RET misc_open() [L85] ldv_s_misc_fops_file_operations++ [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L91] COND TRUE ldv_s_misc_fops_file_operations==1 [L92] CALL misc_read() [L54] return 0; [L92] RET misc_read() [L93] ldv_s_misc_fops_file_operations++ [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: [L99] COND TRUE ldv_s_misc_fops_file_operations==2 [L100] CALL misc_llseek() [L50] return 0; [L100] RET misc_llseek() [L101] ldv_s_misc_fops_file_operations++ [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: [L106] case 3: [L107] COND TRUE ldv_s_misc_fops_file_operations==3 [L108] CALL misc_release() [L36] COND FALSE !(\read(open_called)) [L43] CALL mutex_lock() [L18] (ldv_mutex == 1) ? 0 : __blast_assert() [L19] ldv_mutex = 2 [L43] RET mutex_lock() [L44] CALL mutex_lock() [L18] (ldv_mutex == 1) ? 0 : __blast_assert() [L18] CALL __blast_assert() [L6] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 117 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.9s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 839 SDtfs, 1255 SDslu, 1529 SDs, 0 SdLazy, 1503 SolverSat, 326 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=487occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 7 MinimizatonAttempts, 849 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...