/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/NetBSD_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:06:44,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:06:44,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:06:44,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:06:44,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:06:44,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:06:44,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:06:44,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:06:44,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:06:44,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:06:44,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:06:44,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:06:44,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:06:44,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:06:44,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:06:44,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:06:44,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:06:44,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:06:44,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:06:44,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:06:44,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:06:44,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:06:44,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:06:44,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:06:44,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:06:44,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:06:44,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:06:44,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:06:44,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:06:44,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:06:44,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:06:44,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:06:44,954 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:06:44,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:06:44,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:06:44,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:06:44,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:06:44,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:06:44,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:06:44,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:06:44,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:06:44,956 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:06:44,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:06:44,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:06:44,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:06:44,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:06:44,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:06:44,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:06:44,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:06:44,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:06:44,958 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:06:44,958 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:06:45,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:06:45,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:06:45,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:06:45,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:06:45,261 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:06:45,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2021-05-02 18:06:45,337 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f92cec6f5/b38ceed69b004349a6130e61ce4a22a7/FLAGed77600ef [2021-05-02 18:06:45,829 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:06:45,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2021-05-02 18:06:45,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f92cec6f5/b38ceed69b004349a6130e61ce4a22a7/FLAGed77600ef [2021-05-02 18:06:46,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f92cec6f5/b38ceed69b004349a6130e61ce4a22a7 [2021-05-02 18:06:46,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:06:46,318 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:06:46,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:06:46,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:06:46,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:06:46,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:06:46" (1/1) ... [2021-05-02 18:06:46,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@682d630b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:46, skipping insertion in model container [2021-05-02 18:06:46,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:06:46" (1/1) ... [2021-05-02 18:06:46,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:06:46,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:06:46,451 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/NetBSD_loop.i[893,906] [2021-05-02 18:06:46,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:06:46,467 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:06:46,478 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/NetBSD_loop.i[893,906] [2021-05-02 18:06:46,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:06:46,517 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:06:46,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:46 WrapperNode [2021-05-02 18:06:46,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:06:46,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:06:46,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:06:46,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:06:46,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:46" (1/1) ... [2021-05-02 18:06:46,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:46" (1/1) ... [2021-05-02 18:06:46,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:46" (1/1) ... [2021-05-02 18:06:46,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:46" (1/1) ... [2021-05-02 18:06:46,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:46" (1/1) ... [2021-05-02 18:06:46,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:46" (1/1) ... [2021-05-02 18:06:46,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:46" (1/1) ... [2021-05-02 18:06:46,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:06:46,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:06:46,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:06:46,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:06:46,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:46" (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 18:06:46,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:06:46,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:06:46,658 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:06:46,659 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:06:46,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:06:46,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:06:46,660 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:06:46,660 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:06:46,660 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:06:46,660 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:06:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:06:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:06:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:06:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:06:46,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:06:46,662 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:06:46,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:06:46,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:06:46,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:06:46,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:06:46,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:06:46,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:06:46,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:06:46,929 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:06:46,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:06:46 BoogieIcfgContainer [2021-05-02 18:06:46,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:06:46,931 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:06:46,931 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:06:46,931 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:06:46,933 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:06:46" (1/1) ... [2021-05-02 18:06:46,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:06:46 BasicIcfg [2021-05-02 18:06:46,964 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:06:46,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:06:46,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:06:46,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:06:46,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:06:46" (1/4) ... [2021-05-02 18:06:46,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e52b930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:06:46, skipping insertion in model container [2021-05-02 18:06:46,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:06:46" (2/4) ... [2021-05-02 18:06:46,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e52b930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:06:46, skipping insertion in model container [2021-05-02 18:06:46,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:06:46" (3/4) ... [2021-05-02 18:06:46,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e52b930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:06:46, skipping insertion in model container [2021-05-02 18:06:46,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:06:46" (4/4) ... [2021-05-02 18:06:46,973 INFO L111 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.iJordan [2021-05-02 18:06:46,977 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:06:46,982 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:06:46,996 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:06:47,021 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:06:47,021 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:06:47,021 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:06:47,021 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:06:47,022 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:06:47,022 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:06:47,022 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:06:47,022 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:06:47,038 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 18:06:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 18:06:47,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:47,046 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:47,046 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:47,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:47,053 INFO L82 PathProgramCache]: Analyzing trace with hash -665154378, now seen corresponding path program 1 times [2021-05-02 18:06:47,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:47,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604707581] [2021-05-02 18:06:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:47,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:47,350 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 18:06:47,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:47,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604707581] [2021-05-02 18:06:47,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604707581] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:06:47,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:06:47,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:06:47,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038935825] [2021-05-02 18:06:47,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:06:47,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:47,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:06:47,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:06:47,379 INFO L87 Difference]: Start difference. First operand has 23 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 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 18:06:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:47,627 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-05-02 18:06:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:06:47,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 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 13 [2021-05-02 18:06:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:47,634 INFO L225 Difference]: With dead ends: 30 [2021-05-02 18:06:47,634 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 18:06:47,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:06:47,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 18:06:47,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 18:06:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:06:47,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-05-02 18:06:47,663 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2021-05-02 18:06:47,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:47,663 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-05-02 18:06:47,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 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 18:06:47,663 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-05-02 18:06:47,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 18:06:47,664 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:47,664 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:47,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:06:47,664 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:47,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:47,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1437979323, now seen corresponding path program 1 times [2021-05-02 18:06:47,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:47,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808725353] [2021-05-02 18:06:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:47,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:47,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-05-02 18:06:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:06:47,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:47,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808725353] [2021-05-02 18:06:47,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808725353] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:06:47,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:06:47,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 18:06:47,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693060394] [2021-05-02 18:06:47,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:06:47,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:47,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:06:47,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:06:47,770 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 18:06:47,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:47,963 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-05-02 18:06:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:06:47,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 18 [2021-05-02 18:06:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:47,965 INFO L225 Difference]: With dead ends: 30 [2021-05-02 18:06:47,965 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 18:06:47,966 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:06:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 18:06:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 18:06:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 18:06:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-02 18:06:47,973 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 18 [2021-05-02 18:06:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:47,973 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-02 18:06:47,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 18:06:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-02 18:06:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 18:06:47,975 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:47,975 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:47,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:06:47,975 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:47,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:47,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1407888200, now seen corresponding path program 1 times [2021-05-02 18:06:47,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:47,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145779099] [2021-05-02 18:06:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:48,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:48,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-05-02 18:06:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:48,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 18:06:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:48,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 18:06:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 18:06:48,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:48,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145779099] [2021-05-02 18:06:48,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145779099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:06:48,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41605961] [2021-05-02 18:06:48,090 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 18:06:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:48,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 18:06:48,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:06:48,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 18:06:48,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41605961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:06:48,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:06:48,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 13 [2021-05-02 18:06:48,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642947564] [2021-05-02 18:06:48,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 18:06:48,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:48,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 18:06:48,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 18:06:48,390 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 18:06:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:48,743 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-05-02 18:06:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 18:06:48,744 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2021-05-02 18:06:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:48,745 INFO L225 Difference]: With dead ends: 42 [2021-05-02 18:06:48,745 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 18:06:48,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 341.3ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-05-02 18:06:48,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 18:06:48,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 18:06:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 18:06:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-05-02 18:06:48,755 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 30 [2021-05-02 18:06:48,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:48,755 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-05-02 18:06:48,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 18:06:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-05-02 18:06:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 18:06:48,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:06:48,757 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:06:48,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 18:06:48,977 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:06:48,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:06:48,977 INFO L82 PathProgramCache]: Analyzing trace with hash -699974453, now seen corresponding path program 2 times [2021-05-02 18:06:48,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:06:48,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833917239] [2021-05-02 18:06:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:06:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:49,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:06:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:49,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-05-02 18:06:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:49,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 18:06:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:49,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 18:06:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:49,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-05-02 18:06:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:49,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 18:06:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:06:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 18:06:49,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:06:49,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833917239] [2021-05-02 18:06:49,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833917239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:06:49,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373753482] [2021-05-02 18:06:49,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 18:06:49,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:06:49,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:06:49,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 18:06:49,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:06:49,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:49,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:49,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:49,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:49,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:49,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:49,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:49,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:49,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:49,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:49,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:49,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:49,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:49,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:06:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 18:06:49,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373753482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:06:49,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:06:49,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-02 18:06:49,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159494283] [2021-05-02 18:06:49,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 18:06:49,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:06:49,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 18:06:49,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 18:06:49,370 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 18:06:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:06:49,529 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-05-02 18:06:49,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:06:49,529 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2021-05-02 18:06:49,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:06:49,530 INFO L225 Difference]: With dead ends: 39 [2021-05-02 18:06:49,530 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:06:49,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:06:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:06:49,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:06:49,537 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 18:06:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:06:49,538 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2021-05-02 18:06:49,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:06:49,538 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:06:49,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 18:06:49,538 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:06:49,538 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:06:49,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:06:49,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:06:49 BasicIcfg [2021-05-02 18:06:49,763 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:06:49,764 INFO L168 Benchmark]: Toolchain (without parser) took 3446.32 ms. Allocated memory was 186.6 MB in the beginning and 225.4 MB in the end (delta: 38.8 MB). Free memory was 151.7 MB in the beginning and 183.1 MB in the end (delta: -31.4 MB). Peak memory consumption was 8.7 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:49,764 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 186.6 MB. Free memory is still 168.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:06:49,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.70 ms. Allocated memory is still 186.6 MB. Free memory was 151.5 MB in the beginning and 170.6 MB in the end (delta: -19.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:49,765 INFO L168 Benchmark]: Boogie Preprocessor took 50.38 ms. Allocated memory is still 186.6 MB. Free memory was 170.6 MB in the beginning and 169.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:06:49,765 INFO L168 Benchmark]: RCFGBuilder took 347.74 ms. Allocated memory is still 186.6 MB. Free memory was 169.0 MB in the beginning and 154.7 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:49,765 INFO L168 Benchmark]: IcfgTransformer took 33.11 ms. Allocated memory is still 186.6 MB. Free memory was 154.7 MB in the beginning and 153.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:49,765 INFO L168 Benchmark]: TraceAbstraction took 2798.72 ms. Allocated memory was 186.6 MB in the beginning and 225.4 MB in the end (delta: 38.8 MB). Free memory was 153.0 MB in the beginning and 183.1 MB in the end (delta: -30.2 MB). Peak memory consumption was 9.3 MB. Max. memory is 8.0 GB. [2021-05-02 18:06:49,766 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 186.6 MB. Free memory is still 168.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 195.70 ms. Allocated memory is still 186.6 MB. Free memory was 151.5 MB in the beginning and 170.6 MB in the end (delta: -19.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.38 ms. Allocated memory is still 186.6 MB. Free memory was 170.6 MB in the beginning and 169.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 347.74 ms. Allocated memory is still 186.6 MB. Free memory was 169.0 MB in the beginning and 154.7 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 33.11 ms. Allocated memory is still 186.6 MB. Free memory was 154.7 MB in the beginning and 153.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2798.72 ms. Allocated memory was 186.6 MB in the beginning and 225.4 MB in the end (delta: 38.8 MB). Free memory was 153.0 MB in the beginning and 183.1 MB in the end (delta: -30.2 MB). Peak memory consumption was 9.3 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, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2741.0ms, OverallIterations: 4, TraceHistogramMax: 6, EmptinessCheckTime: 14.6ms, AutomataDifference: 986.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 57 SDtfs, 90 SDslu, 116 SDs, 0 SdLazy, 288 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 288.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 828.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=3, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 31.2ms AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 37.1ms SsaConstructionTime, 120.0ms SatisfiabilityAnalysisTime, 904.2ms InterpolantComputationTime, 175 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 169 ConstructedInterpolants, 0 QuantifiedInterpolants, 443 SizeOfPredicates, 8 NumberOfNonLiveVariables, 251 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 143/164 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...