/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:44:58,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:44:58,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:44:58,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:44:58,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:44:58,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:44:58,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:44:58,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:44:58,831 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:44:58,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:44:58,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:44:58,832 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:44:58,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:44:58,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:44:58,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:44:58,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:44:58,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:44:58,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:44:58,833 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:44:58,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:44:58,833 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:44:58,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:44:58,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:44:58,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:44:58,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:44:58,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:44:58,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:44:58,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:44:58,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:44:58,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:44:58,835 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:44:58,835 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:44:59,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:44:59,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:44:59,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:44:59,273 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:44:59,274 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:44:59,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i [2021-05-02 23:44:59,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e5a28e72/3801283d04164e2db5ddfc6e46c58038/FLAG58b48e85b [2021-05-02 23:44:59,975 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:44:59,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1_variant.i [2021-05-02 23:44:59,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e5a28e72/3801283d04164e2db5ddfc6e46c58038/FLAG58b48e85b [2021-05-02 23:45:00,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e5a28e72/3801283d04164e2db5ddfc6e46c58038 [2021-05-02 23:45:00,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:45:00,395 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:45:00,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:45:00,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:45:00,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:45:00,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:45:00" (1/1) ... [2021-05-02 23:45:00,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@310ae045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:00, skipping insertion in model container [2021-05-02 23:45:00,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:45:00" (1/1) ... [2021-05-02 23:45:00,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:45:00,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:45:00,519 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-new/count_by_1_variant.i[891,904] [2021-05-02 23:45:00,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:45:00,537 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:45:00,584 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-new/count_by_1_variant.i[891,904] [2021-05-02 23:45:00,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:45:00,613 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:45:00,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:00 WrapperNode [2021-05-02 23:45:00,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:45:00,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:45:00,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:45:00,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:45:00,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:00" (1/1) ... [2021-05-02 23:45:00,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:00" (1/1) ... [2021-05-02 23:45:00,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:00" (1/1) ... [2021-05-02 23:45:00,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:00" (1/1) ... [2021-05-02 23:45:00,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:00" (1/1) ... [2021-05-02 23:45:00,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:00" (1/1) ... [2021-05-02 23:45:00,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:00" (1/1) ... [2021-05-02 23:45:00,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:45:00,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:45:00,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:45:00,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:45:00,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:00" (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 23:45:00,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:45:00,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:45:00,765 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:45:00,765 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 23:45:00,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:45:00,766 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:45:00,766 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:45:00,766 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:45:00,766 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:45:00,766 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:45:00,766 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:45:00,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:45:00,767 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 23:45:00,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:45:00,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:45:00,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:45:00,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:45:00,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:45:00,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:45:00,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:45:00,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:45:00,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:45:01,068 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:45:01,068 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:45:01,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:45:01 BoogieIcfgContainer [2021-05-02 23:45:01,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:45:01,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:45:01,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:45:01,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:45:01,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:45:00" (1/3) ... [2021-05-02 23:45:01,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f26903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:45:01, skipping insertion in model container [2021-05-02 23:45:01,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:00" (2/3) ... [2021-05-02 23:45:01,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f26903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:45:01, skipping insertion in model container [2021-05-02 23:45:01,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:45:01" (3/3) ... [2021-05-02 23:45:01,076 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i [2021-05-02 23:45:01,081 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:45:01,084 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:45:01,097 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:45:01,121 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:45:01,121 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:45:01,121 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:45:01,121 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:45:01,122 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:45:01,122 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:45:01,122 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:45:01,122 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:45:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 23:45:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:45:01,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:01,153 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:01,154 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:01,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:01,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1307585362, now seen corresponding path program 1 times [2021-05-02 23:45:01,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:01,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985903782] [2021-05-02 23:45:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:01,212 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:45:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:01,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:01,477 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 23:45:01,479 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:01,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985903782] [2021-05-02 23:45:01,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1985903782] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:01,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:01,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:45:01,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479097776] [2021-05-02 23:45:01,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:45:01,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:01,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:45:01,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:45:01,507 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 23:45:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:01,846 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-05-02 23:45:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:45:01,848 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2021-05-02 23:45:01,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:01,854 INFO L225 Difference]: With dead ends: 41 [2021-05-02 23:45:01,854 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 23:45:01,857 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:45:01,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 23:45:01,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 23:45:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 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 23:45:01,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 23:45:01,909 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 11 [2021-05-02 23:45:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:01,911 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 23:45:01,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 23:45:01,912 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 23:45:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:45:01,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:01,913 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:01,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:45:01,913 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:01,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:01,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2000663987, now seen corresponding path program 1 times [2021-05-02 23:45:01,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:01,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476589018] [2021-05-02 23:45:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:01,980 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= v_main_~i~0_12 1000000) (not (= v_main_~i~0_12 1000000))) InVars {main_~i~0=v_main_~i~0_12} OutVars{main_~i~0=v_main_~i~0_12} AuxVars[] AssignedVars[] [2021-05-02 23:45:01,995 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 94.4 percent of original size [2021-05-02 23:45:02,065 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:02,106 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:02,139 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:45:02,146 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:45:02,200 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 94.4 percent of original size 68 [2021-05-02 23:45:02,227 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:02,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:02,357 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 23:45:02,472 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:02,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476589018] [2021-05-02 23:45:02,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1476589018] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:02,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:02,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:45:02,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257114476] [2021-05-02 23:45:02,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:45:02,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:02,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:45:02,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:45:02,486 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 12 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:45:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:02,724 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 23:45:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:45:02,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 23:45:02,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:02,726 INFO L225 Difference]: With dead ends: 22 [2021-05-02 23:45:02,726 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 23:45:02,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:45:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 23:45:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 23:45:02,730 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 23:45:02,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 23:45:02,730 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-05-02 23:45:02,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:02,731 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 23:45:02,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:45:02,732 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 23:45:02,732 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 23:45:02,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:45:02,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 23:45:03,162 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 23:45:03,162 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 23:45:03,163 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 23:45:03,164 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-02 23:45:03,164 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-02 23:45:03,171 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-02 23:45:03,172 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-02 23:45:03,172 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 23:45:03,172 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 23:45:03,172 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-02 23:45:03,172 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-02 23:45:03,172 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-02 23:45:03,172 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-02 23:45:03,173 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-02 23:45:03,173 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 30) the Hoare annotation is: true [2021-05-02 23:45:03,173 INFO L194 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (<= main_~i~0 0) [2021-05-02 23:45:03,173 INFO L194 CegarLoopUtils]: At program point L27-1(lines 26 28) the Hoare annotation is: (<= main_~i~0 0) [2021-05-02 23:45:03,173 INFO L194 CegarLoopUtils]: At program point mainEXIT(lines 24 30) the Hoare annotation is: (<= main_~i~0 1000000) [2021-05-02 23:45:03,173 INFO L194 CegarLoopUtils]: At program point L26-2(lines 26 28) the Hoare annotation is: (= (ite (<= main_~i~0 1000000) 1 0) 1) [2021-05-02 23:45:03,174 INFO L194 CegarLoopUtils]: At program point L26-3(lines 26 28) the Hoare annotation is: (<= main_~i~0 1000000) [2021-05-02 23:45:03,174 INFO L194 CegarLoopUtils]: At program point mainFINAL(lines 24 30) the Hoare annotation is: (<= main_~i~0 1000000) [2021-05-02 23:45:03,174 INFO L194 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2021-05-02 23:45:03,174 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-02 23:45:03,175 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2021-05-02 23:45:03,175 INFO L194 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (not (= |__VERIFIER_assert_#in~cond| 1)) [2021-05-02 23:45:03,175 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (not (= |__VERIFIER_assert_#in~cond| 1)) [2021-05-02 23:45:03,175 INFO L194 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2021-05-02 23:45:03,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:45:03 BoogieIcfgContainer [2021-05-02 23:45:03,195 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:45:03,196 INFO L168 Benchmark]: Toolchain (without parser) took 2799.90 ms. Allocated memory was 190.8 MB in the beginning and 230.7 MB in the end (delta: 39.8 MB). Free memory was 155.5 MB in the beginning and 195.8 MB in the end (delta: -40.3 MB). Peak memory consumption was 82.1 MB. Max. memory is 8.0 GB. [2021-05-02 23:45:03,197 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 190.8 MB. Free memory was 172.5 MB in the beginning and 172.4 MB in the end (delta: 106.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:45:03,197 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.51 ms. Allocated memory is still 190.8 MB. Free memory was 155.3 MB in the beginning and 173.9 MB in the end (delta: -18.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. [2021-05-02 23:45:03,198 INFO L168 Benchmark]: Boogie Preprocessor took 63.57 ms. Allocated memory is still 190.8 MB. Free memory was 173.9 MB in the beginning and 172.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 23:45:03,198 INFO L168 Benchmark]: RCFGBuilder took 387.32 ms. Allocated memory is still 190.8 MB. Free memory was 172.8 MB in the beginning and 158.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 23:45:03,199 INFO L168 Benchmark]: TraceAbstraction took 2123.66 ms. Allocated memory was 190.8 MB in the beginning and 230.7 MB in the end (delta: 39.8 MB). Free memory was 158.2 MB in the beginning and 195.8 MB in the end (delta: -37.7 MB). Peak memory consumption was 84.1 MB. Max. memory is 8.0 GB. [2021-05-02 23:45:03,200 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 190.8 MB. Free memory was 172.5 MB in the beginning and 172.4 MB in the end (delta: 106.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 217.51 ms. Allocated memory is still 190.8 MB. Free memory was 155.3 MB in the beginning and 173.9 MB in the end (delta: -18.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.57 ms. Allocated memory is still 190.8 MB. Free memory was 173.9 MB in the beginning and 172.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 387.32 ms. Allocated memory is still 190.8 MB. Free memory was 172.8 MB in the beginning and 158.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2123.66 ms. Allocated memory was 190.8 MB in the beginning and 230.7 MB in the end (delta: 39.8 MB). Free memory was 158.2 MB in the beginning and 195.8 MB in the end (delta: -37.7 MB). Peak memory consumption was 84.1 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 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1614.5ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 10.9ms, AutomataDifference: 612.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 427.1ms, InitialAbstractionConstructionTime: 21.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20 SDtfs, 38 SDslu, 53 SDs, 0 SdLazy, 89 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 153.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 495.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=1, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 40.7ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 20 LocationsWithAnnotation, 32 PreInvPairs, 47 NumberOfFragments, 88 HoareAnnotationTreeSize, 32 FomulaSimplifications, 108 FormulaSimplificationTreeSizeReduction, 145.2ms HoareSimplificationTime, 20 FomulaSimplificationsInter, 594 FormulaSimplificationTreeSizeReductionInter, 246.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (if i <= 1000000 then 1 else 0) == 1 - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: i <= 1000000 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: !(\old(cond) == 1) || \old(cond) == cond RESULT: Ultimate proved your program to be correct! Received shutdown request...