/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/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:01:43,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:01:43,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:01:43,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 22:01:43,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 22:01:43,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 22:01:43,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 22:01:43,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 22:01:43,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 22:01:43,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 22:01:43,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 22:01:43,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 22:01:43,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:01:43,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:01:43,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:01:43,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:01:43,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:01:43,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:01:43,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:01:43,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:01:43,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:01:43,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:01:43,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:01:43,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:01:43,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 22:01:43,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:01:43,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:01:43,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:01:43,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 22:01:43,502 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:01:43,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:01:43,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:01:43,507 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:01:43,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:01:43,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:01:43,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:01:43,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:01:43,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:01:43,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:01:43,510 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:01:43,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:01:43,510 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:01:43,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:01:43,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:01:43,511 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:01:43,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:01:43,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:01:43,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:01:43,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:01:43,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:01:43,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:01:43,512 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:01:43,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:01:43,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:01:43,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:01:43,993 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:01:43,994 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:01:43,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-10-23 22:01:44,086 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a69e7fb2e/da7a75db67e74aebbe4ac0997aff9276/FLAGb6dceac9a [2020-10-23 22:01:44,760 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:01:44,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-10-23 22:01:44,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a69e7fb2e/da7a75db67e74aebbe4ac0997aff9276/FLAGb6dceac9a [2020-10-23 22:01:45,080 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a69e7fb2e/da7a75db67e74aebbe4ac0997aff9276 [2020-10-23 22:01:45,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:01:45,092 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:01:45,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:01:45,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:01:45,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:01:45,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:01:45" (1/1) ... [2020-10-23 22:01:45,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66d4e2c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:45, skipping insertion in model container [2020-10-23 22:01:45,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:01:45" (1/1) ... [2020-10-23 22:01:45,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:01:45,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:01:45,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:01:45,431 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:01:45,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:01:45,584 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:01:45,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:45 WrapperNode [2020-10-23 22:01:45,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:01:45,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:01:45,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:01:45,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:01:45,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:45" (1/1) ... [2020-10-23 22:01:45,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:45" (1/1) ... [2020-10-23 22:01:45,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:45" (1/1) ... [2020-10-23 22:01:45,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:45" (1/1) ... [2020-10-23 22:01:45,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:45" (1/1) ... [2020-10-23 22:01:45,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:45" (1/1) ... [2020-10-23 22:01:45,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:45" (1/1) ... [2020-10-23 22:01:45,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:01:45,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:01:45,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:01:45,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:01:45,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:45" (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 [2020-10-23 22:01:45,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:01:45,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:01:45,763 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:01:45,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:01:45,763 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:01:45,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:01:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:01:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:01:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-10-23 22:01:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-10-23 22:01:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:01:45,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:01:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:01:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 22:01:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:01:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:01:45,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:01:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:01:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:01:45,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 22:01:46,808 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:01:46,809 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 22:01:46,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:01:46 BoogieIcfgContainer [2020-10-23 22:01:46,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:01:46,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:01:46,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:01:46,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:01:46,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:01:45" (1/3) ... [2020-10-23 22:01:46,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7299712f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:01:46, skipping insertion in model container [2020-10-23 22:01:46,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:45" (2/3) ... [2020-10-23 22:01:46,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7299712f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:01:46, skipping insertion in model container [2020-10-23 22:01:46,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:01:46" (3/3) ... [2020-10-23 22:01:46,822 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-10-23 22:01:46,834 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:01:46,839 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:01:46,853 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:01:46,877 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:01:46,878 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:01:46,878 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:01:46,878 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:01:46,878 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:01:46,878 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:01:46,878 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:01:46,879 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:01:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states. [2020-10-23 22:01:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-23 22:01:46,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:01:46,928 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, 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, 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, 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, 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] [2020-10-23 22:01:46,928 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:01:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:01:46,935 INFO L82 PathProgramCache]: Analyzing trace with hash 873587710, now seen corresponding path program 1 times [2020-10-23 22:01:46,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:01:46,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621099572] [2020-10-23 22:01:46,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:01:47,017 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:01:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:01:47,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:01:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:01:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:01:47,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621099572] [2020-10-23 22:01:47,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:01:47,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 22:01:47,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250127485] [2020-10-23 22:01:47,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 22:01:47,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:01:47,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 22:01:47,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 22:01:47,909 INFO L87 Difference]: Start difference. First operand 356 states. Second operand 6 states. [2020-10-23 22:01:49,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:01:49,019 INFO L93 Difference]: Finished difference Result 395 states and 403 transitions. [2020-10-23 22:01:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 22:01:49,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 323 [2020-10-23 22:01:49,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:01:49,039 INFO L225 Difference]: With dead ends: 395 [2020-10-23 22:01:49,039 INFO L226 Difference]: Without dead ends: 355 [2020-10-23 22:01:49,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-23 22:01:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-23 22:01:49,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 336. [2020-10-23 22:01:49,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-23 22:01:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 337 transitions. [2020-10-23 22:01:49,161 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 337 transitions. Word has length 323 [2020-10-23 22:01:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:01:49,164 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 337 transitions. [2020-10-23 22:01:49,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 22:01:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 337 transitions. [2020-10-23 22:01:49,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-23 22:01:49,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:01:49,184 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, 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, 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, 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, 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] [2020-10-23 22:01:49,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:01:49,186 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:01:49,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:01:49,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1259668514, now seen corresponding path program 1 times [2020-10-23 22:01:49,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:01:49,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361493500] [2020-10-23 22:01:49,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:01:49,198 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:01:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:01:49,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:01:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:01:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:01:49,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361493500] [2020-10-23 22:01:49,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:01:49,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:01:49,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534973576] [2020-10-23 22:01:49,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:01:49,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:01:49,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:01:49,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:01:49,562 INFO L87 Difference]: Start difference. First operand 336 states and 337 transitions. Second operand 5 states. [2020-10-23 22:01:50,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:01:50,576 INFO L93 Difference]: Finished difference Result 381 states and 384 transitions. [2020-10-23 22:01:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:01:50,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2020-10-23 22:01:50,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:01:50,585 INFO L225 Difference]: With dead ends: 381 [2020-10-23 22:01:50,585 INFO L226 Difference]: Without dead ends: 355 [2020-10-23 22:01:50,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:01:50,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-23 22:01:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 341. [2020-10-23 22:01:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-23 22:01:50,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 342 transitions. [2020-10-23 22:01:50,639 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 342 transitions. Word has length 323 [2020-10-23 22:01:50,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:01:50,641 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 342 transitions. [2020-10-23 22:01:50,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:01:50,641 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 342 transitions. [2020-10-23 22:01:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-10-23 22:01:50,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:01:50,649 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:01:50,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:01:50,649 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:01:50,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:01:50,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1311604414, now seen corresponding path program 1 times [2020-10-23 22:01:50,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:01:50,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945878541] [2020-10-23 22:01:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:01:50,756 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:01:50,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:01:51,915 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 159 DAG size of output: 156 [2020-10-23 22:01:52,022 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:01:52,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:02:13,963 WARN L193 SmtUtils]: Spent 21.85 s on a formula simplification. DAG size of input: 831 DAG size of output: 828 [2020-10-23 22:02:15,446 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 103 DAG size of output: 100 [2020-10-23 22:02:15,503 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:02:15,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:02:38,636 WARN L193 SmtUtils]: Spent 23.06 s on a formula simplification. DAG size of input: 729 DAG size of output: 726 [2020-10-23 22:02:38,703 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:02:38,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts