/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/id_trans.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:08:18,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:08:18,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:08:18,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:08:18,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:08:18,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:08:18,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:08:18,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:08:18,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:08:18,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:08:18,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:08:18,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-02 18:08:18,829 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:08:18,842 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:08:18,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:08:18,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:08:18,843 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:08:18,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:08:18,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:08:18,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:08:18,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:08:18,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:08:18,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:08:18,844 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:08:18,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:08:18,845 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:08:18,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:08:18,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:08:18,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:08:18,845 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:08:18,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:08:18,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:08:18,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:08:18,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:08:18,847 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:08:18,847 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:08:19,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:08:19,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:08:19,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:08:19,188 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:08:19,189 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:08:19,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_trans.i [2021-05-02 18:08:19,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19c6eac59/42f0c639e4fe4cabb71c396ea0486ed4/FLAGa554109d7 [2021-05-02 18:08:19,740 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:08:19,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_trans.i [2021-05-02 18:08:19,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19c6eac59/42f0c639e4fe4cabb71c396ea0486ed4/FLAGa554109d7 [2021-05-02 18:08:20,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19c6eac59/42f0c639e4fe4cabb71c396ea0486ed4 [2021-05-02 18:08:20,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:08:20,241 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:08:20,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:08:20,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:08:20,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:08:20,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:08:20" (1/1) ... [2021-05-02 18:08:20,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e349c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:20, skipping insertion in model container [2021-05-02 18:08:20,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:08:20" (1/1) ... [2021-05-02 18:08:20,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:08:20,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:08:20,429 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/id_trans.i[893,906] [2021-05-02 18:08:20,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:08:20,450 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:08:20,509 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/id_trans.i[893,906] [2021-05-02 18:08:20,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:08:20,537 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:08:20,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:20 WrapperNode [2021-05-02 18:08:20,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:08:20,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:08:20,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:08:20,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:08:20,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:20" (1/1) ... [2021-05-02 18:08:20,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:20" (1/1) ... [2021-05-02 18:08:20,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:20" (1/1) ... [2021-05-02 18:08:20,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:20" (1/1) ... [2021-05-02 18:08:20,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:20" (1/1) ... [2021-05-02 18:08:20,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:20" (1/1) ... [2021-05-02 18:08:20,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:20" (1/1) ... [2021-05-02 18:08:20,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:08:20,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:08:20,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:08:20,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:08:20,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:08:20,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:08:20,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:08:20,649 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:08:20,649 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:08:20,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:08:20,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:08:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:08:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:08:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:08:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:08:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:08:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:08:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:08:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:08:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:08:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:08:20,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:08:20,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:08:20,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:08:20,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:08:20,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:08:20,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:08:20,922 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:08:20,923 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:08:20,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:08:20 BoogieIcfgContainer [2021-05-02 18:08:20,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:08:20,924 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:08:20,924 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:08:20,925 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:08:20,927 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:08:20" (1/1) ... [2021-05-02 18:08:20,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:08:20 BasicIcfg [2021-05-02 18:08:20,941 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:08:20,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:08:20,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:08:20,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:08:20,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:08:20" (1/4) ... [2021-05-02 18:08:20,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1929d25f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:08:20, skipping insertion in model container [2021-05-02 18:08:20,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:20" (2/4) ... [2021-05-02 18:08:20,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1929d25f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:08:20, skipping insertion in model container [2021-05-02 18:08:20,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:08:20" (3/4) ... [2021-05-02 18:08:20,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1929d25f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:08:20, skipping insertion in model container [2021-05-02 18:08:20,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:08:20" (4/4) ... [2021-05-02 18:08:20,947 INFO L111 eAbstractionObserver]: Analyzing ICFG id_trans.iJordan [2021-05-02 18:08:20,951 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:08:20,954 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:08:20,968 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:08:20,984 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:08:20,985 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:08:20,985 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:08:20,985 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:08:20,985 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:08:20,985 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:08:20,985 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:08:20,985 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:08:20,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 18:08:21,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 18:08:21,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:21,003 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:08:21,003 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:21,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1124237314, now seen corresponding path program 1 times [2021-05-02 18:08:21,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:21,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696975543] [2021-05-02 18:08:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:21,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:21,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:21,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696975543] [2021-05-02 18:08:21,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696975543] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:08:21,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:08:21,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:08:21,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646123829] [2021-05-02 18:08:21,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:08:21,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:21,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:08:21,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:08:21,318 INFO L87 Difference]: Start difference. First operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:08:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:21,577 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 18:08:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:08:21,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2021-05-02 18:08:21,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:21,584 INFO L225 Difference]: With dead ends: 30 [2021-05-02 18:08:21,585 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 18:08:21,586 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:08:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 18:08:21,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 18:08:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 18:08:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-05-02 18:08:21,615 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2021-05-02 18:08:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:21,615 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-05-02 18:08:21,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:08:21,616 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-05-02 18:08:21,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 18:08:21,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:21,617 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:08:21,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:08:21,617 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash -74729474, now seen corresponding path program 1 times [2021-05-02 18:08:21,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:21,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348063082] [2021-05-02 18:08:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:21,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:21,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-02 18:08:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:21,705 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 18:08:21,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:21,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348063082] [2021-05-02 18:08:21,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348063082] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:08:21,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:08:21,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:08:21,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034255797] [2021-05-02 18:08:21,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:08:21,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:21,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:08:21,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:08:21,709 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 18:08:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:21,907 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-05-02 18:08:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:08:21,908 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 17 [2021-05-02 18:08:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:21,909 INFO L225 Difference]: With dead ends: 27 [2021-05-02 18:08:21,909 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 18:08:21,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:08:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 18:08:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 18:08:21,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 18:08:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-05-02 18:08:21,914 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2021-05-02 18:08:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:21,915 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-05-02 18:08:21,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 18:08:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-05-02 18:08:21,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 18:08:21,916 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:21,916 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:08:21,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:08:21,916 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:21,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:21,917 INFO L82 PathProgramCache]: Analyzing trace with hash -353153412, now seen corresponding path program 1 times [2021-05-02 18:08:21,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:21,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781835427] [2021-05-02 18:08:21,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 18:08:21,944 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 18:08:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 18:08:21,967 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 18:08:21,992 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 18:08:21,992 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 18:08:21,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 18:08:22,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:08:22 BasicIcfg [2021-05-02 18:08:22,019 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:08:22,020 INFO L168 Benchmark]: Toolchain (without parser) took 1779.91 ms. Allocated memory is still 189.8 MB. Free memory was 155.3 MB in the beginning and 109.2 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.5 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:22,021 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 189.8 MB. Free memory is still 172.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:08:22,021 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.38 ms. Allocated memory is still 189.8 MB. Free memory was 155.1 MB in the beginning and 173.3 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:22,022 INFO L168 Benchmark]: Boogie Preprocessor took 39.32 ms. Allocated memory is still 189.8 MB. Free memory was 173.3 MB in the beginning and 171.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:22,022 INFO L168 Benchmark]: RCFGBuilder took 344.50 ms. Allocated memory is still 189.8 MB. Free memory was 171.7 MB in the beginning and 157.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:22,023 INFO L168 Benchmark]: IcfgTransformer took 16.60 ms. Allocated memory is still 189.8 MB. Free memory was 156.7 MB in the beginning and 155.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:22,024 INFO L168 Benchmark]: TraceAbstraction took 1077.30 ms. Allocated memory is still 189.8 MB. Free memory was 154.9 MB in the beginning and 109.2 MB in the end (delta: 45.7 MB). Peak memory consumption was 46.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:22,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 189.8 MB. Free memory is still 172.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 296.38 ms. Allocated memory is still 189.8 MB. Free memory was 155.1 MB in the beginning and 173.3 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.32 ms. Allocated memory is still 189.8 MB. Free memory was 173.3 MB in the beginning and 171.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 344.50 ms. Allocated memory is still 189.8 MB. Free memory was 171.7 MB in the beginning and 157.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.60 ms. Allocated memory is still 189.8 MB. Free memory was 156.7 MB in the beginning and 155.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1077.30 ms. Allocated memory is still 189.8 MB. Free memory was 154.9 MB in the beginning and 109.2 MB in the end (delta: 45.7 MB). Peak memory consumption was 46.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int idBitLength, material_length, nlen; [L26] int j, k; [L27] nlen = __VERIFIER_nondet_int() [L28] idBitLength = __VERIFIER_nondet_int() [L29] material_length = __VERIFIER_nondet_int() [L30] COND FALSE !(!( nlen == idBitLength / 32 )) [L31] j = 0 VAL [idBitLength=17, j=0, material_length=5, nlen=0] [L31] COND TRUE (j < idBitLength / 8) && (j < material_length) VAL [idBitLength=17, j=0, material_length=5, nlen=0] [L32] CALL __VERIFIER_assert( 0 <= j) VAL [\old(cond)=1] [L18] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L32] RET __VERIFIER_assert( 0 <= j) VAL [idBitLength=17, j=0, material_length=5, nlen=0] [L33] CALL __VERIFIER_assert( j < material_length ) VAL [\old(cond)=1] [L18] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L33] RET __VERIFIER_assert( j < material_length ) VAL [idBitLength=17, j=0, material_length=5, nlen=0] [L34] CALL __VERIFIER_assert( 0 <= j/4 ) VAL [\old(cond)=1] [L18] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L34] RET __VERIFIER_assert( 0 <= j/4 ) VAL [idBitLength=17, j=0, material_length=5, nlen=0] [L35] CALL __VERIFIER_assert( j/4 < nlen) VAL [\old(cond)=0] [L18] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1010.7ms, OverallIterations: 3, TraceHistogramMax: 4, EmptinessCheckTime: 11.0ms, AutomataDifference: 481.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 37 SDtfs, 36 SDslu, 54 SDs, 0 SdLazy, 110 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 164.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 320.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=2, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21.9ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.3ms SsaConstructionTime, 68.1ms SatisfiabilityAnalysisTime, 243.8ms InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 95 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...