/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/loops/trex03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:49:54,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:49:54,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:49:54,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 17:49:54,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 17:49:54,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 17:49:54,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 17:49:54,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 17:49:54,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 17:49:54,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 17:49:54,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 17:49:54,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-02 17:49:54,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:49:54,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:49:54,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:49:54,860 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:49:54,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:49:54,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:49:54,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:49:54,882 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:49:54,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:49:54,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:49:54,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:49:54,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:49:54,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:49:54,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:49:54,884 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:49:54,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:49:54,884 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:49:54,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:49:54,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:49:54,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:49:54,885 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:49:54,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:49:54,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:49:54,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:49:54,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:49:54,887 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:49:54,887 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:49:55,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:49:55,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:49:55,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:49:55,259 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:49:55,261 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:49:55,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex03-2.c [2021-05-02 17:49:55,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0d46e5d3/4f8bb10a50a041ceb0f8448f51d34b2d/FLAGf4c7c64a2 [2021-05-02 17:49:55,753 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:49:55,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex03-2.c [2021-05-02 17:49:55,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0d46e5d3/4f8bb10a50a041ceb0f8448f51d34b2d/FLAGf4c7c64a2 [2021-05-02 17:49:55,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0d46e5d3/4f8bb10a50a041ceb0f8448f51d34b2d [2021-05-02 17:49:55,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:49:55,783 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:49:55,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:49:55,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:49:55,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:49:55,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:49:55" (1/1) ... [2021-05-02 17:49:55,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70035c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:55, skipping insertion in model container [2021-05-02 17:49:55,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:49:55" (1/1) ... [2021-05-02 17:49:55,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:49:55,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:49:55,971 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex03-2.c[320,333] [2021-05-02 17:49:55,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:49:55,995 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:49:56,007 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex03-2.c[320,333] [2021-05-02 17:49:56,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:49:56,032 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:49:56,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:56 WrapperNode [2021-05-02 17:49:56,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:49:56,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:49:56,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:49:56,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:49:56,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:56" (1/1) ... [2021-05-02 17:49:56,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:56" (1/1) ... [2021-05-02 17:49:56,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:56" (1/1) ... [2021-05-02 17:49:56,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:56" (1/1) ... [2021-05-02 17:49:56,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:56" (1/1) ... [2021-05-02 17:49:56,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:56" (1/1) ... [2021-05-02 17:49:56,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:56" (1/1) ... [2021-05-02 17:49:56,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:49:56,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:49:56,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:49:56,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:49:56,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:56" (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 17:49:56,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:49:56,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:49:56,205 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:49:56,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:49:56,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:49:56,206 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:49:56,206 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:49:56,206 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:49:56,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:49:56,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:49:56,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 17:49:56,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-02 17:49:56,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:49:56,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:49:56,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:49:56,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:49:56,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:49:56,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:49:56,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:49:56,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:49:56,498 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:49:56,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:49:56 BoogieIcfgContainer [2021-05-02 17:49:56,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:49:56,501 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:49:56,501 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:49:56,501 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:49:56,504 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:49:56" (1/1) ... [2021-05-02 17:49:56,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:49:56 BasicIcfg [2021-05-02 17:49:56,518 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:49:56,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:49:56,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:49:56,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:49:56,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:49:55" (1/4) ... [2021-05-02 17:49:56,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e9a04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:49:56, skipping insertion in model container [2021-05-02 17:49:56,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:49:56" (2/4) ... [2021-05-02 17:49:56,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e9a04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:49:56, skipping insertion in model container [2021-05-02 17:49:56,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:49:56" (3/4) ... [2021-05-02 17:49:56,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e9a04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:49:56, skipping insertion in model container [2021-05-02 17:49:56,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:49:56" (4/4) ... [2021-05-02 17:49:56,524 INFO L111 eAbstractionObserver]: Analyzing ICFG trex03-2.cJordan [2021-05-02 17:49:56,529 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:49:56,540 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:49:56,568 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:49:56,607 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:49:56,607 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:49:56,607 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:49:56,608 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:49:56,608 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:49:56,608 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:49:56,608 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:49:56,608 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:49:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 17:49:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 17:49:56,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:49:56,629 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:49:56,630 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:49:56,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:49:56,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1772068984, now seen corresponding path program 1 times [2021-05-02 17:49:56,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:49:56,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669265348] [2021-05-02 17:49:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:49:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:56,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:49:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:56,914 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 17:49:56,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:49:56,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669265348] [2021-05-02 17:49:56,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669265348] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:49:56,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:49:56,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:49:56,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424228163] [2021-05-02 17:49:56,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:49:56,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:49:56,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:49:56,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:49:56,937 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 17:49:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:49:56,982 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-02 17:49:56,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:49:56,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 17:49:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:49:56,990 INFO L225 Difference]: With dead ends: 22 [2021-05-02 17:49:56,990 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 17:49:56,992 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:49:57,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 17:49:57,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 17:49:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 3 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 17:49:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-05-02 17:49:57,023 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-05-02 17:49:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:49:57,024 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-05-02 17:49:57,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 17:49:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-05-02 17:49:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 17:49:57,025 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:49:57,025 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:49:57,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:49:57,026 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:49:57,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:49:57,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1771145463, now seen corresponding path program 1 times [2021-05-02 17:49:57,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:49:57,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034952408] [2021-05-02 17:49:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:49:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:57,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:49:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:57,186 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 17:49:57,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:49:57,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034952408] [2021-05-02 17:49:57,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034952408] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:49:57,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:49:57,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 17:49:57,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174593238] [2021-05-02 17:49:57,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:49:57,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:49:57,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:49:57,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:49:57,189 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 5 states have (on average 1.4) 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 17:49:57,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:49:57,337 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-05-02 17:49:57,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:49:57,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) 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 17:49:57,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:49:57,339 INFO L225 Difference]: With dead ends: 13 [2021-05-02 17:49:57,340 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:49:57,341 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:49:57,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:49:57,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:49:57,342 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 17:49:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:49:57,342 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-05-02 17:49:57,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:49:57,342 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:49:57,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.4) 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 17:49:57,343 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:49:57,343 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:49:57,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:49:57,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:49:57 BasicIcfg [2021-05-02 17:49:57,349 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:49:57,350 INFO L168 Benchmark]: Toolchain (without parser) took 1566.68 ms. Allocated memory is still 231.7 MB. Free memory was 197.6 MB in the beginning and 192.0 MB in the end (delta: 5.5 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:49:57,350 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 231.7 MB. Free memory is still 214.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:49:57,352 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.88 ms. Allocated memory is still 231.7 MB. Free memory was 197.5 MB in the beginning and 188.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 17:49:57,353 INFO L168 Benchmark]: Boogie Preprocessor took 94.04 ms. Allocated memory is still 231.7 MB. Free memory was 187.8 MB in the beginning and 215.4 MB in the end (delta: -27.6 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. [2021-05-02 17:49:57,356 INFO L168 Benchmark]: RCFGBuilder took 369.18 ms. Allocated memory is still 231.7 MB. Free memory was 215.4 MB in the beginning and 200.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:49:57,360 INFO L168 Benchmark]: IcfgTransformer took 17.14 ms. Allocated memory is still 231.7 MB. Free memory was 200.8 MB in the beginning and 199.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:49:57,361 INFO L168 Benchmark]: TraceAbstraction took 829.53 ms. Allocated memory is still 231.7 MB. Free memory was 199.2 MB in the beginning and 192.0 MB in the end (delta: 7.1 MB). Peak memory consumption was 8.7 MB. Max. memory is 8.0 GB. [2021-05-02 17:49:57,365 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 231.7 MB. Free memory is still 214.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 243.88 ms. Allocated memory is still 231.7 MB. Free memory was 197.5 MB in the beginning and 188.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 94.04 ms. Allocated memory is still 231.7 MB. Free memory was 187.8 MB in the beginning and 215.4 MB in the end (delta: -27.6 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 369.18 ms. Allocated memory is still 231.7 MB. Free memory was 215.4 MB in the beginning and 200.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 17.14 ms. Allocated memory is still 231.7 MB. Free memory was 200.8 MB in the beginning and 199.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 829.53 ms. Allocated memory is still 231.7 MB. Free memory was 199.2 MB in the beginning and 192.0 MB in the end (delta: 7.1 MB). Peak memory consumption was 8.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 739.6ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 15.6ms, AutomataDifference: 222.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 35 SDtfs, 25 SDslu, 19 SDs, 0 SdLazy, 34 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 59.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 206.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18.9ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.5ms SsaConstructionTime, 59.6ms SatisfiabilityAnalysisTime, 282.8ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 107 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...