/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invgen/large_const.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:08:24,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:08:24,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:08:24,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:08:24,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:08:24,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:08:24,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:08:24,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:08:24,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:08:24,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:08:24,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:08:24,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:08:24,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:08:24,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:08:24,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:08:24,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:08:24,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:08:24,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:08:24,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:08:24,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:08:24,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:08:24,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:08:24,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:08:24,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:08:24,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 18:08:24,062 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 18:08:24,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 18:08:24,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 18:08:24,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 18:08:24,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 18:08:24,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 18:08:24,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 18:08:24,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 18:08:24,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 18:08:24,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 18:08:24,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 18:08:24,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 18:08:24,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 18:08:24,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:08:24,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:08:24,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:08:24,071 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:08:24,080 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:08:24,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:08:24,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:08:24,082 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:08:24,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:08:24,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:08:24,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:08:24,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:08:24,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:08:24,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:08:24,098 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:08:24,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:08:24,098 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:08:24,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:08:24,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:08:24,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:08:24,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:08:24,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:08:24,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:08:24,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:08:24,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:08:24,101 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:08:24,101 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:08:24,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:08:24,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:08:24,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:08:24,400 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:08:24,401 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:08:24,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2021-05-02 18:08:24,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd389dd60/1515d738e2d84393ab0cd2204169db8b/FLAGb8b6faf2a [2021-05-02 18:08:24,901 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:08:24,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/large_const.i [2021-05-02 18:08:24,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd389dd60/1515d738e2d84393ab0cd2204169db8b/FLAGb8b6faf2a [2021-05-02 18:08:25,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd389dd60/1515d738e2d84393ab0cd2204169db8b [2021-05-02 18:08:25,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:08:25,315 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:08:25,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:08:25,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:08:25,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:08:25,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:08:25" (1/1) ... [2021-05-02 18:08:25,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@562f7f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:25, skipping insertion in model container [2021-05-02 18:08:25,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:08:25" (1/1) ... [2021-05-02 18:08:25,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:08:25,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:08:25,477 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/large_const.i[893,906] [2021-05-02 18:08:25,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:08:25,495 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:08:25,506 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/large_const.i[893,906] [2021-05-02 18:08:25,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:08:25,522 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:08:25,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:25 WrapperNode [2021-05-02 18:08:25,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:08:25,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:08:25,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:08:25,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:08:25,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:25" (1/1) ... [2021-05-02 18:08:25,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:25" (1/1) ... [2021-05-02 18:08:25,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:25" (1/1) ... [2021-05-02 18:08:25,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:25" (1/1) ... [2021-05-02 18:08:25,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:25" (1/1) ... [2021-05-02 18:08:25,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:25" (1/1) ... [2021-05-02 18:08:25,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:25" (1/1) ... [2021-05-02 18:08:25,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:08:25,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:08:25,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:08:25,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:08:25,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:25" (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 [2021-05-02 18:08:25,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:08:25,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:08:25,649 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:08:25,649 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:08:25,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:08:25,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:08:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:08:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:08:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:08:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:08:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:08:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:08:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:08:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:08:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:08:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:08:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:08:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:08:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:08:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:08:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:08:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:08:25,982 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:08:25,982 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 18:08:25,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:08:25 BoogieIcfgContainer [2021-05-02 18:08:25,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:08:25,984 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:08:25,984 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:08:25,985 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:08:25,988 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:08:25" (1/1) ... [2021-05-02 18:08:26,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:08:26 BasicIcfg [2021-05-02 18:08:26,003 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:08:26,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:08:26,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:08:26,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:08:26,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:08:25" (1/4) ... [2021-05-02 18:08:26,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3012ce34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:08:26, skipping insertion in model container [2021-05-02 18:08:26,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:25" (2/4) ... [2021-05-02 18:08:26,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3012ce34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:08:26, skipping insertion in model container [2021-05-02 18:08:26,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:08:25" (3/4) ... [2021-05-02 18:08:26,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3012ce34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:08:26, skipping insertion in model container [2021-05-02 18:08:26,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:08:26" (4/4) ... [2021-05-02 18:08:26,010 INFO L111 eAbstractionObserver]: Analyzing ICFG large_const.iJordan [2021-05-02 18:08:26,014 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:08:26,018 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:08:26,032 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:08:26,048 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:08:26,048 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:08:26,048 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:08:26,048 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:08:26,049 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:08:26,049 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:08:26,049 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:08:26,049 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:08:26,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:08:26,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 18:08:26,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:26,066 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:08:26,066 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:26,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:26,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1699974766, now seen corresponding path program 1 times [2021-05-02 18:08:26,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:26,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033360451] [2021-05-02 18:08:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:26,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:26,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:26,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033360451] [2021-05-02 18:08:26,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033360451] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:08:26,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:08:26,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:08:26,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282370044] [2021-05-02 18:08:26,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:08:26,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:26,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:08:26,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:08:26,361 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:08:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:26,657 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-05-02 18:08:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 18:08:26,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 18:08:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:26,664 INFO L225 Difference]: With dead ends: 32 [2021-05-02 18:08:26,665 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 18:08:26,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-02 18:08:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 18:08:26,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 18:08:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:08:26,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-05-02 18:08:26,689 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2021-05-02 18:08:26,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:26,690 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-05-02 18:08:26,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:08:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-05-02 18:08:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 18:08:26,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:26,690 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:08:26,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:08:26,691 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:26,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:26,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1632940157, now seen corresponding path program 1 times [2021-05-02 18:08:26,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:26,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365325060] [2021-05-02 18:08:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:26,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:26,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:26,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365325060] [2021-05-02 18:08:26,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365325060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:26,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135431044] [2021-05-02 18:08:26,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:08:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:26,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 18:08:26,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:08:27,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:27,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:27,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:27,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:27,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:27,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135431044] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:27,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:08:27,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-02 18:08:27,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322792170] [2021-05-02 18:08:27,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 18:08:27,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:27,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 18:08:27,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-02 18:08:27,141 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:08:27,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:27,692 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-02 18:08:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 18:08:27,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 18:08:27,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:27,697 INFO L225 Difference]: With dead ends: 40 [2021-05-02 18:08:27,698 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 18:08:27,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 452.0ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:08:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 18:08:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2021-05-02 18:08:27,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:08:27,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-05-02 18:08:27,717 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 17 [2021-05-02 18:08:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:27,718 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-05-02 18:08:27,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:08:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-05-02 18:08:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 18:08:27,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:27,726 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:08:27,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 18:08:27,945 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:27,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:27,946 INFO L82 PathProgramCache]: Analyzing trace with hash 922895784, now seen corresponding path program 1 times [2021-05-02 18:08:27,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:27,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034963082] [2021-05-02 18:08:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:28,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:28,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:28,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034963082] [2021-05-02 18:08:28,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034963082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:28,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150791077] [2021-05-02 18:08:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:08:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:28,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 18:08:28,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:08:28,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:28,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:28,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:28,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:28,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:28,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150791077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:28,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:08:28,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-02 18:08:28,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208636849] [2021-05-02 18:08:28,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 18:08:28,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:28,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 18:08:28,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-02 18:08:28,262 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:08:28,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:28,661 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2021-05-02 18:08:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 18:08:28,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 18:08:28,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:28,665 INFO L225 Difference]: With dead ends: 50 [2021-05-02 18:08:28,665 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 18:08:28,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:08:28,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 18:08:28,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-02 18:08:28,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 31 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:08:28,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 18:08:28,677 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 18 [2021-05-02 18:08:28,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:28,678 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 18:08:28,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:08:28,678 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 18:08:28,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 18:08:28,679 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:28,679 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:08:28,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:08:28,897 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:28,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:28,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1629261177, now seen corresponding path program 1 times [2021-05-02 18:08:28,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:28,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675028033] [2021-05-02 18:08:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:29,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:29,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:29,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675028033] [2021-05-02 18:08:29,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675028033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:29,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625977432] [2021-05-02 18:08:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:08:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:29,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 18:08:29,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:08:29,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:29,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:29,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:29,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:29,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:29,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625977432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:29,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:08:29,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-02 18:08:29,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368522879] [2021-05-02 18:08:29,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 18:08:29,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:29,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 18:08:29,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-02 18:08:29,195 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:08:29,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:29,473 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-05-02 18:08:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 18:08:29,478 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 18:08:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:29,479 INFO L225 Difference]: With dead ends: 54 [2021-05-02 18:08:29,479 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 18:08:29,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:08:29,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 18:08:29,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2021-05-02 18:08:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.4) internal successors, (49), 36 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:08:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 56 transitions. [2021-05-02 18:08:29,484 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 56 transitions. Word has length 18 [2021-05-02 18:08:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:29,485 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 56 transitions. [2021-05-02 18:08:29,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:08:29,485 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 56 transitions. [2021-05-02 18:08:29,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 18:08:29,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:29,486 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:08:29,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:08:29,701 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:29,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:29,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1917225923, now seen corresponding path program 1 times [2021-05-02 18:08:29,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:29,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968444050] [2021-05-02 18:08:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:29,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:29,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:29,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968444050] [2021-05-02 18:08:29,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968444050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:29,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774844240] [2021-05-02 18:08:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:08:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:29,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 18:08:29,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:08:29,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:29,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:29,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:29,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:29,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:29,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774844240] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:08:29,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:08:29,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-05-02 18:08:29,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163483807] [2021-05-02 18:08:29,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 18:08:29,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:29,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 18:08:29,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:08:29,917 INFO L87 Difference]: Start difference. First operand 43 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:08:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:29,928 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-05-02 18:08:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 18:08:29,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 18:08:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:29,930 INFO L225 Difference]: With dead ends: 30 [2021-05-02 18:08:29,930 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 18:08:29,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:08:29,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 18:08:29,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-05-02 18:08:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:08:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-05-02 18:08:29,938 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2021-05-02 18:08:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:29,938 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-05-02 18:08:29,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:08:29,939 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-05-02 18:08:29,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 18:08:29,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:29,940 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:08:30,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:08:30,153 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:30,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:30,153 INFO L82 PathProgramCache]: Analyzing trace with hash -56166734, now seen corresponding path program 1 times [2021-05-02 18:08:30,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:30,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101139184] [2021-05-02 18:08:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:30,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:30,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 18:08:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:30,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:30,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101139184] [2021-05-02 18:08:30,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101139184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:30,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957760192] [2021-05-02 18:08:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:08:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:30,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 18:08:30,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:08:30,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:30,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:30,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:30,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:30,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:30,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:30,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:30,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957760192] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:08:30,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:08:30,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-05-02 18:08:30,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351565159] [2021-05-02 18:08:30,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 18:08:30,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:30,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 18:08:30,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:08:30,433 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:08:30,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:30,447 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-05-02 18:08:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 18:08:30,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-05-02 18:08:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:30,448 INFO L225 Difference]: With dead ends: 21 [2021-05-02 18:08:30,448 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:08:30,448 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:08:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:08:30,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:08:30,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 18:08:30,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:08:30,449 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-05-02 18:08:30,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:30,449 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:08:30,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:08:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:08:30,449 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:08:30,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 18:08:30,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:08:30 BasicIcfg [2021-05-02 18:08:30,653 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:08:30,654 INFO L168 Benchmark]: Toolchain (without parser) took 5339.09 ms. Allocated memory was 200.3 MB in the beginning and 274.7 MB in the end (delta: 74.4 MB). Free memory was 166.5 MB in the beginning and 239.8 MB in the end (delta: -73.3 MB). Peak memory consumption was 1.8 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:30,654 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 200.3 MB. Free memory is still 183.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:08:30,654 INFO L168 Benchmark]: CACSL2BoogieTranslator took 205.41 ms. Allocated memory is still 200.3 MB. Free memory was 166.3 MB in the beginning and 156.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:30,654 INFO L168 Benchmark]: Boogie Preprocessor took 26.70 ms. Allocated memory is still 200.3 MB. Free memory was 156.4 MB in the beginning and 155.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:30,654 INFO L168 Benchmark]: RCFGBuilder took 432.25 ms. Allocated memory is still 200.3 MB. Free memory was 154.9 MB in the beginning and 169.0 MB in the end (delta: -14.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:30,654 INFO L168 Benchmark]: IcfgTransformer took 18.79 ms. Allocated memory is still 200.3 MB. Free memory was 169.0 MB in the beginning and 167.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:30,655 INFO L168 Benchmark]: TraceAbstraction took 4648.73 ms. Allocated memory was 200.3 MB in the beginning and 274.7 MB in the end (delta: 74.4 MB). Free memory was 167.3 MB in the beginning and 239.8 MB in the end (delta: -72.5 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:30,655 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 200.3 MB. Free memory is still 183.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 205.41 ms. Allocated memory is still 200.3 MB. Free memory was 166.3 MB in the beginning and 156.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.70 ms. Allocated memory is still 200.3 MB. Free memory was 156.4 MB in the beginning and 155.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 432.25 ms. Allocated memory is still 200.3 MB. Free memory was 154.9 MB in the beginning and 169.0 MB in the end (delta: -14.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * IcfgTransformer took 18.79 ms. Allocated memory is still 200.3 MB. Free memory was 169.0 MB in the beginning and 167.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4648.73 ms. Allocated memory was 200.3 MB in the beginning and 274.7 MB in the end (delta: 74.4 MB). Free memory was 167.3 MB in the beginning and 239.8 MB in the end (delta: -72.5 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4603.9ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 12.7ms, AutomataDifference: 1601.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 141 SDtfs, 211 SDslu, 162 SDs, 0 SdLazy, 574 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 515.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 170 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1282.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=4, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 51.8ms AutomataMinimizationTime, 6 MinimizatonAttempts, 33 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 58.2ms SsaConstructionTime, 214.7ms SatisfiabilityAnalysisTime, 1308.6ms InterpolantComputationTime, 210 NumberOfCodeBlocks, 210 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 199 ConstructedInterpolants, 0 QuantifiedInterpolants, 669 SizeOfPredicates, 9 NumberOfNonLiveVariables, 589 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 16/26 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...