/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/ldv-regression/test14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:12:44,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:12:44,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:12:44,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:12:44,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:12:44,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:12:44,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:12:44,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:12:44,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:12:44,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:12:44,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:12:44,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:12:44,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:12:44,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:12:44,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:12:44,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:12:44,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:12:44,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:12:44,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:12:44,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:12:44,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:12:44,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:12:44,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:12:44,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:12:44,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:12:44,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:12:44,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:12:44,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:12:44,684 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 01:12:44,729 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:12:44,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:12:44,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:12:44,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:12:44,733 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:12:44,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:12:44,734 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:12:44,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:12:44,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:12:44,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:12:44,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:12:44,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:12:44,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:12:44,739 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:12:44,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:12:44,739 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:12:44,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:12:44,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:12:44,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:12:44,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:12:44,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:12:44,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:12:44,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:12:44,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:12:44,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:12:44,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:12:44,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:12:44,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:12:44,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:12:44,742 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 01:12:45,147 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:12:45,179 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:12:45,188 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:12:45,191 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:12:45,193 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:12:45,195 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test14.c [2020-07-21 01:12:45,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a86c2e7c3/3379c2b1a6b8450399274c34583117a9/FLAG40d255f88 [2020-07-21 01:12:46,017 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:12:46,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test14.c [2020-07-21 01:12:46,029 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a86c2e7c3/3379c2b1a6b8450399274c34583117a9/FLAG40d255f88 [2020-07-21 01:12:46,337 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a86c2e7c3/3379c2b1a6b8450399274c34583117a9 [2020-07-21 01:12:46,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:12:46,358 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:12:46,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:12:46,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:12:46,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:12:46,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:12:46" (1/1) ... [2020-07-21 01:12:46,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4edfcffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:12:46, skipping insertion in model container [2020-07-21 01:12:46,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:12:46" (1/1) ... [2020-07-21 01:12:46,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:12:46,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:12:46,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:12:46,825 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:12:46,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:12:46,886 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:12:46,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:12:46 WrapperNode [2020-07-21 01:12:46,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:12:46,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:12:46,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:12:46,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:12:46,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:12:46" (1/1) ... [2020-07-21 01:12:46,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:12:46" (1/1) ... [2020-07-21 01:12:47,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:12:46" (1/1) ... [2020-07-21 01:12:47,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:12:46" (1/1) ... [2020-07-21 01:12:47,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:12:46" (1/1) ... [2020-07-21 01:12:47,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:12:46" (1/1) ... [2020-07-21 01:12:47,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:12:46" (1/1) ... [2020-07-21 01:12:47,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:12:47,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:12:47,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:12:47,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:12:47,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:12:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:12:47,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:12:47,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:12:47,157 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2020-07-21 01:12:47,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:12:47,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:12:47,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:12:47,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 01:12:47,157 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2020-07-21 01:12:47,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:12:47,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 01:12:47,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-21 01:12:47,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:12:47,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:12:47,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:12:47,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:12:47,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:12:47,539 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:12:47,540 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 01:12:47,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:12:47 BoogieIcfgContainer [2020-07-21 01:12:47,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:12:47,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:12:47,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:12:47,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:12:47,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:12:46" (1/3) ... [2020-07-21 01:12:47,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b40c7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:12:47, skipping insertion in model container [2020-07-21 01:12:47,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:12:46" (2/3) ... [2020-07-21 01:12:47,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b40c7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:12:47, skipping insertion in model container [2020-07-21 01:12:47,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:12:47" (3/3) ... [2020-07-21 01:12:47,589 INFO L109 eAbstractionObserver]: Analyzing ICFG test14.c [2020-07-21 01:12:47,611 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:12:47,622 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:12:47,647 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:12:47,698 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:12:47,699 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:12:47,699 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:12:47,699 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:12:47,699 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:12:47,699 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:12:47,700 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:12:47,700 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:12:47,741 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-21 01:12:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 01:12:47,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:12:47,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:12:47,757 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:12:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:12:47,772 INFO L82 PathProgramCache]: Analyzing trace with hash 521841741, now seen corresponding path program 1 times [2020-07-21 01:12:47,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:12:47,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133168970] [2020-07-21 01:12:47,804 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 01:12:47,970 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:12:47,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:12:47,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:12:47,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:12:48,107 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:12:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:12:48,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:12:48,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133168970] [2020-07-21 01:12:48,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:12:48,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:12:48,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807902930] [2020-07-21 01:12:48,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:12:48,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:12:48,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:12:48,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:12:48,179 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-07-21 01:12:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:12:48,311 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-07-21 01:12:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:12:48,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 01:12:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:12:48,330 INFO L225 Difference]: With dead ends: 29 [2020-07-21 01:12:48,330 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 01:12:48,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:12:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 01:12:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 01:12:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 01:12:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 01:12:48,413 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-07-21 01:12:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:12:48,413 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 01:12:48,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:12:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 01:12:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 01:12:48,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:12:48,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:12:48,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:12:48,632 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:12:48,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:12:48,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1019657549, now seen corresponding path program 1 times [2020-07-21 01:12:48,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:12:48,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859612016] [2020-07-21 01:12:48,635 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 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:12:48,838 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:12:48,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:12:48,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:12:48,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:12:48,878 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:12:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:12:48,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:12:48,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859612016] [2020-07-21 01:12:48,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:12:48,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:12:48,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250775546] [2020-07-21 01:12:48,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:12:48,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:12:48,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:12:48,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:12:48,898 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-07-21 01:12:48,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:12:48,979 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-07-21 01:12:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:12:48,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-21 01:12:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:12:48,981 INFO L225 Difference]: With dead ends: 18 [2020-07-21 01:12:48,981 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:12:48,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:12:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:12:48,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:12:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:12:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:12:48,985 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-07-21 01:12:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:12:48,985 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:12:48,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:12:48,986 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:12:48,986 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:12:49,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:12:49,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:12:49,336 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:12:49,337 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:12:49,338 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:12:49,338 INFO L268 CegarLoopResult]: For program point get_dummyFINAL(lines 7 10) no Hoare annotation was computed. [2020-07-21 01:12:49,338 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-07-21 01:12:49,339 INFO L271 CegarLoopResult]: At program point get_dummyENTRY(lines 7 10) the Hoare annotation is: true [2020-07-21 01:12:49,339 INFO L268 CegarLoopResult]: For program point get_dummyEXIT(lines 7 10) no Hoare annotation was computed. [2020-07-21 01:12:49,339 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:12:49,340 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (< 0 |#StackHeapBarrier|) [2020-07-21 01:12:49,341 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:12:49,341 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:12:49,341 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-07-21 01:12:49,342 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 27) the Hoare annotation is: true [2020-07-21 01:12:49,342 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 27) no Hoare annotation was computed. [2020-07-21 01:12:49,353 INFO L264 CegarLoopResult]: At program point L20(lines 12 27) the Hoare annotation is: (not (< 0 |#StackHeapBarrier|)) [2020-07-21 01:12:49,354 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-07-21 01:12:49,354 INFO L268 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-07-21 01:12:49,354 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (or (<= 2 main_~pc~0.base) (not (< 0 |#StackHeapBarrier|))) [2020-07-21 01:12:49,355 INFO L268 CegarLoopResult]: For program point L19-2(line 19) no Hoare annotation was computed. [2020-07-21 01:12:49,355 INFO L268 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-07-21 01:12:49,357 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 21) no Hoare annotation was computed. [2020-07-21 01:12:49,358 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 27) no Hoare annotation was computed. [2020-07-21 01:12:49,374 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-21 01:12:49,384 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-21 01:12:49,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:12:49 BoogieIcfgContainer [2020-07-21 01:12:49,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:12:49,400 INFO L168 Benchmark]: Toolchain (without parser) took 3040.02 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 103.6 MB in the beginning and 103.2 MB in the end (delta: 381.0 kB). Peak memory consumption was 64.9 MB. Max. memory is 7.1 GB. [2020-07-21 01:12:49,402 INFO L168 Benchmark]: CDTParser took 1.13 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 01:12:49,406 INFO L168 Benchmark]: CACSL2BoogieTranslator took 522.71 ms. Allocated memory is still 138.4 MB. Free memory was 103.1 MB in the beginning and 93.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:12:49,409 INFO L168 Benchmark]: Boogie Preprocessor took 169.68 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 93.4 MB in the beginning and 181.1 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-21 01:12:49,410 INFO L168 Benchmark]: RCFGBuilder took 483.76 ms. Allocated memory is still 202.9 MB. Free memory was 181.1 MB in the beginning and 165.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:12:49,412 INFO L168 Benchmark]: TraceAbstraction took 1829.43 ms. Allocated memory is still 202.9 MB. Free memory was 164.6 MB in the beginning and 103.2 MB in the end (delta: 61.4 MB). Peak memory consumption was 61.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:12:49,428 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.13 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 522.71 ms. Allocated memory is still 138.4 MB. Free memory was 103.1 MB in the beginning and 93.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 169.68 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 93.4 MB in the beginning and 181.1 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 483.76 ms. Allocated memory is still 202.9 MB. Free memory was 181.1 MB in the beginning and 165.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1829.43 ms. Allocated memory is still 202.9 MB. Free memory was 164.6 MB in the beginning and 103.2 MB in the end (delta: 61.4 MB). Peak memory consumption was 61.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier - GenericResult: Unfinished Backtranslation unknown boogie variable #StackHeapBarrier * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant [2020-07-21 01:12:49,457 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier [2020-07-21 01:12:49,458 WARN L1295 BoogieBacktranslator]: unknown boogie variable #StackHeapBarrier Derived loop invariant: !(0 < unknown-#StackHeapBarrier-unknown) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 32 SDslu, 63 SDs, 0 SdLazy, 15 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 19 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 18 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 858 SizeOfPredicates, 12 NumberOfNonLiveVariables, 232 ConjunctsInSsa, 16 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...