/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:02:36,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:02:36,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:02:36,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:02:36,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:02:36,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:02:36,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:02:36,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:02:36,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:02:36,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:02:36,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:02:36,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:02:36,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:02:36,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:02:36,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:02:36,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:02:36,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:02:36,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:02:36,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:02:36,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:02:36,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:02:36,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:02:36,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:02:36,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:02:36,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:02:36,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:02:36,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:02:36,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:02:36,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:02:36,619 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:02:36,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:02:36,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:02:36,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:02:36,621 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:02:36,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:02:36,621 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:02:36,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:02:36,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:02:36,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:02:36,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:02:36,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:02:36,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:02:36,622 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:02:36,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:02:36,623 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:02:36,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:02:36,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:02:36,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:02:36,624 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:02:36,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:02:36,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:02:36,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:02:36,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:02:36,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:02:36,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:02:36,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:36,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:02:36,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:02:36,626 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:02:36,901 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:02:36,914 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:02:36,917 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:02:36,919 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:02:36,919 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:02:36,920 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c [2020-07-21 22:02:36,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7dc9e10b/e1890bcdbb894cc7a57637ecbf712eb5/FLAGdfcad2793 [2020-07-21 22:02:37,338 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:02:37,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector-regression/recHanoi03-1.c [2020-07-21 22:02:37,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7dc9e10b/e1890bcdbb894cc7a57637ecbf712eb5/FLAGdfcad2793 [2020-07-21 22:02:37,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7dc9e10b/e1890bcdbb894cc7a57637ecbf712eb5 [2020-07-21 22:02:37,730 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:02:37,733 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:02:37,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:37,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:02:37,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:02:37,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:37" (1/1) ... [2020-07-21 22:02:37,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26871d1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:37, skipping insertion in model container [2020-07-21 22:02:37,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:37" (1/1) ... [2020-07-21 22:02:37,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:02:37,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:02:37,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:37,922 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:02:37,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:37,950 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:02:37,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:37 WrapperNode [2020-07-21 22:02:37,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:37,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:02:37,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:02:37,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:02:37,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:37" (1/1) ... [2020-07-21 22:02:37,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:37" (1/1) ... [2020-07-21 22:02:37,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:37" (1/1) ... [2020-07-21 22:02:37,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:37" (1/1) ... [2020-07-21 22:02:37,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:37" (1/1) ... [2020-07-21 22:02:37,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:37" (1/1) ... [2020-07-21 22:02:37,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:37" (1/1) ... [2020-07-21 22:02:37,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:02:37,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:02:37,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:02:37,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:02:37,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:37" (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 [2020-07-21 22:02:38,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:02:38,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:02:38,107 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-21 22:02:38,107 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:02:38,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:02:38,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:02:38,107 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-21 22:02:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:02:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:02:38,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:02:38,293 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:02:38,293 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:02:38,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:38 BoogieIcfgContainer [2020-07-21 22:02:38,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:02:38,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:02:38,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:02:38,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:02:38,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:02:37" (1/3) ... [2020-07-21 22:02:38,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ca6dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:02:38, skipping insertion in model container [2020-07-21 22:02:38,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:37" (2/3) ... [2020-07-21 22:02:38,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ca6dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:02:38, skipping insertion in model container [2020-07-21 22:02:38,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:38" (3/3) ... [2020-07-21 22:02:38,307 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2020-07-21 22:02:38,318 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:02:38,326 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:02:38,343 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:02:38,376 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:02:38,377 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:02:38,377 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:02:38,377 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:02:38,379 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:02:38,379 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:02:38,380 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:02:38,380 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:02:38,420 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 22:02:38,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:02:38,437 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:38,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:38,438 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times [2020-07-21 22:02:38,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:38,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953812514] [2020-07-21 22:02:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:38,617 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:02:38,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 22:02:38,618 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:02:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 22:02:38,628 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:02:38,644 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 22:02:38,645 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 22:02:38,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:38,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:02:38 BoogieIcfgContainer [2020-07-21 22:02:38,869 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:02:38,872 INFO L168 Benchmark]: Toolchain (without parser) took 1139.51 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 103.3 MB in the beginning and 156.4 MB in the end (delta: -53.1 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-21 22:02:38,874 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 22:02:38,875 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.07 ms. Allocated memory is still 139.5 MB. Free memory was 102.9 MB in the beginning and 93.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 22:02:38,876 INFO L168 Benchmark]: Boogie Preprocessor took 24.32 ms. Allocated memory is still 139.5 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:02:38,878 INFO L168 Benchmark]: RCFGBuilder took 321.60 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 171.5 MB in the end (delta: -79.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 22:02:38,879 INFO L168 Benchmark]: TraceAbstraction took 570.44 ms. Allocated memory is still 203.4 MB. Free memory was 170.8 MB in the beginning and 156.4 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:02:38,885 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 217.07 ms. Allocated memory is still 139.5 MB. Free memory was 102.9 MB in the beginning and 93.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.32 ms. Allocated memory is still 139.5 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.60 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 171.5 MB in the end (delta: -79.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 570.44 ms. Allocated memory is still 203.4 MB. Free memory was 170.8 MB in the beginning and 156.4 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 34]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 31. Possible FailurePath: [L25] int n = __VERIFIER_nondet_int(); [L26] COND FALSE !(n < 1) VAL [n=1] [L29] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L17] COND TRUE n == 1 [L18] return 1; VAL [\old(n)=1, \result=1, n=1] [L29] RET, EXPR hanoi(n) VAL [hanoi(n)=1, n=1] [L29] unsigned result = hanoi(n); [L31] COND FALSE !(result+1>0 && result+1 == 1<