/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/elimination_max_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:27:04,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:27:04,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:27:04,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:27:04,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:27:04,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:27:04,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:27:04,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:27:05,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:27:05,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:27:05,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:27:05,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:27:05,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:27:05,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:27:05,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:27:05,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:27:05,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:27:05,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:27:05,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:27:05,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:27:05,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:27:05,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:27:05,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:27:05,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:27:05,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:27:05,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:27:05,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:27:05,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:27:05,058 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 [2020-07-20 01:27:05,092 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:27:05,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:27:05,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:27:05,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:27:05,101 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:27:05,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:27:05,101 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:27:05,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:27:05,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:27:05,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:27:05,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:27:05,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:27:05,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:27:05,103 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:27:05,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:27:05,103 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:27:05,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:27:05,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:27:05,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:27:05,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:27:05,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:27:05,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:27:05,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:27:05,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:27:05,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:27:05,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:27:05,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:27:05,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:27:05,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:27:05,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:27:05,448 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:27:05,473 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:27:05,477 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:27:05,481 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:27:05,488 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:27:05,490 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec.c [2020-07-20 01:27:05,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f54003a8/3d4f4f26d8d248b6aae5b124c8e66dc9/FLAG2340e3479 [2020-07-20 01:27:06,053 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:27:06,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max_rec.c [2020-07-20 01:27:06,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f54003a8/3d4f4f26d8d248b6aae5b124c8e66dc9/FLAG2340e3479 [2020-07-20 01:27:06,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f54003a8/3d4f4f26d8d248b6aae5b124c8e66dc9 [2020-07-20 01:27:06,397 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:27:06,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:27:06,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:27:06,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:27:06,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:27:06,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:27:06" (1/1) ... [2020-07-20 01:27:06,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eba8892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:06, skipping insertion in model container [2020-07-20 01:27:06,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:27:06" (1/1) ... [2020-07-20 01:27:06,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:27:06,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:27:06,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:27:06,637 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:27:06,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:27:06,681 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:27:06,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:06 WrapperNode [2020-07-20 01:27:06,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:27:06,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:27:06,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:27:06,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:27:06,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:06" (1/1) ... [2020-07-20 01:27:06,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:06" (1/1) ... [2020-07-20 01:27:06,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:06" (1/1) ... [2020-07-20 01:27:06,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:06" (1/1) ... [2020-07-20 01:27:06,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:06" (1/1) ... [2020-07-20 01:27:06,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:06" (1/1) ... [2020-07-20 01:27:06,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:06" (1/1) ... [2020-07-20 01:27:06,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:27:06,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:27:06,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:27:06,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:27:06,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:06" (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 [2020-07-20 01:27:06,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:27:06,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:27:06,891 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 01:27:06,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:27:06,891 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-20 01:27:06,891 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:27:06,892 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-07-20 01:27:06,892 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 01:27:06,892 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 01:27:06,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:27:06,892 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:27:06,892 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 01:27:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:27:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:27:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 01:27:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 01:27:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:27:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 01:27:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-07-20 01:27:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:27:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:27:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:27:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 01:27:07,238 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:27:07,239 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 01:27:07,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:27:07 BoogieIcfgContainer [2020-07-20 01:27:07,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:27:07,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:27:07,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:27:07,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:27:07,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:27:06" (1/3) ... [2020-07-20 01:27:07,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc1157e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:27:07, skipping insertion in model container [2020-07-20 01:27:07,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:27:06" (2/3) ... [2020-07-20 01:27:07,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc1157e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:27:07, skipping insertion in model container [2020-07-20 01:27:07,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:27:07" (3/3) ... [2020-07-20 01:27:07,253 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2020-07-20 01:27:07,264 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:27:07,272 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:27:07,285 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:27:07,309 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:27:07,309 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:27:07,309 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:27:07,310 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:27:07,310 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:27:07,310 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:27:07,310 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:27:07,310 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:27:07,331 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-07-20 01:27:07,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 01:27:07,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:27:07,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:27:07,338 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:27:07,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:27:07,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1882906983, now seen corresponding path program 1 times [2020-07-20 01:27:07,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:27:07,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825415658] [2020-07-20 01:27:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74cd712f [2020-07-20 01:27:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:27:07,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825415658] [2020-07-20 01:27:07,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:27:07,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 01:27:07,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709698364] [2020-07-20 01:27:07,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 01:27:07,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:27:07,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 01:27:07,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 01:27:07,592 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2020-07-20 01:27:07,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:27:07,780 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-07-20 01:27:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:27:07,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-20 01:27:07,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:27:07,794 INFO L225 Difference]: With dead ends: 77 [2020-07-20 01:27:07,795 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 01:27:07,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:27:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 01:27:07,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-20 01:27:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 01:27:07,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-07-20 01:27:07,853 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 24 [2020-07-20 01:27:07,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:27:07,854 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-07-20 01:27:07,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 01:27:07,854 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-07-20 01:27:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 01:27:07,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:27:07,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:27:07,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:27:07,858 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:27:07,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:27:07,858 INFO L82 PathProgramCache]: Analyzing trace with hash 861838629, now seen corresponding path program 1 times [2020-07-20 01:27:07,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:27:07,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569114639] [2020-07-20 01:27:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74cd712f [2020-07-20 01:27:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:27:08,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569114639] [2020-07-20 01:27:08,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:27:08,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 01:27:08,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661667198] [2020-07-20 01:27:08,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:27:08,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:27:08,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:27:08,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:27:08,046 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2020-07-20 01:27:08,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:27:08,560 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-07-20 01:27:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 01:27:08,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-07-20 01:27:08,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:27:08,565 INFO L225 Difference]: With dead ends: 64 [2020-07-20 01:27:08,565 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 01:27:08,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:27:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 01:27:08,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-07-20 01:27:08,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 01:27:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-07-20 01:27:08,586 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 24 [2020-07-20 01:27:08,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:27:08,587 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-07-20 01:27:08,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:27:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-07-20 01:27:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 01:27:08,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:27:08,588 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:27:08,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:27:08,589 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:27:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:27:08,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1086413545, now seen corresponding path program 1 times [2020-07-20 01:27:08,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:27:08,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387130917] [2020-07-20 01:27:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74cd712f [2020-07-20 01:27:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:27:08,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387130917] [2020-07-20 01:27:08,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549024255] [2020-07-20 01:27:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74e7d65b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:27:08,920 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74e7d65b issued 4 check-sat command(s) [2020-07-20 01:27:08,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:27:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 01:27:08,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:27:09,012 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:27:09,013 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:27:09,018 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:27:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:27:09,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:27:09,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 14 [2020-07-20 01:27:09,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918788812] [2020-07-20 01:27:09,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:27:09,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:27:09,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:27:09,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:27:09,054 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 8 states. [2020-07-20 01:27:09,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:27:09,256 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-07-20 01:27:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:27:09,257 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-07-20 01:27:09,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:27:09,259 INFO L225 Difference]: With dead ends: 68 [2020-07-20 01:27:09,259 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 01:27:09,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-07-20 01:27:09,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 01:27:09,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2020-07-20 01:27:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 01:27:09,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-07-20 01:27:09,270 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2020-07-20 01:27:09,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:27:09,271 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-07-20 01:27:09,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:27:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-07-20 01:27:09,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 01:27:09,273 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:27:09,273 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:27:09,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 01:27:09,489 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:27:09,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:27:09,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1344635178, now seen corresponding path program 1 times [2020-07-20 01:27:09,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:27:09,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016774063] [2020-07-20 01:27:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74cd712f [2020-07-20 01:27:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:27:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 01:27:09,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016774063] [2020-07-20 01:27:09,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456174063] [2020-07-20 01:27:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3472cd0e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:27:09,803 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3472cd0e issued 4 check-sat command(s) [2020-07-20 01:27:09,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:27:09,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 01:27:09,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:27:09,852 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2020-07-20 01:27:09,853 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:27:09,857 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:27:09,858 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:27:09,859 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-07-20 01:27:11,881 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_1 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_1))) is different from true [2020-07-20 01:27:13,937 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_3 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_3))) is different from true [2020-07-20 01:27:16,004 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_4 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_4))) is different from true [2020-07-20 01:27:18,042 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_5 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_5))) is different from true [2020-07-20 01:27:18,087 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2020-07-20 01:27:18,088 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:27:18,098 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:27:18,100 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 01:27:18,100 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2020-07-20 01:27:18,123 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:27:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2020-07-20 01:27:18,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:27:18,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 19 [2020-07-20 01:27:18,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465745145] [2020-07-20 01:27:18,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 01:27:18,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:27:18,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 01:27:18,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=184, Unknown=4, NotChecked=116, Total=342 [2020-07-20 01:27:18,174 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 19 states. [2020-07-20 01:27:24,475 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-20 01:27:28,546 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2020-07-20 01:27:36,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:27:36,874 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-07-20 01:27:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 01:27:36,875 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-07-20 01:27:36,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:27:36,876 INFO L225 Difference]: With dead ends: 47 [2020-07-20 01:27:36,877 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 01:27:36,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=107, Invalid=501, Unknown=8, NotChecked=196, Total=812 [2020-07-20 01:27:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 01:27:36,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 01:27:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 01:27:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 01:27:36,880 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2020-07-20 01:27:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:27:36,881 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 01:27:36,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 01:27:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 01:27:36,881 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 01:27:37,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:27:37,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 01:27:37,679 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:27:37,679 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-07-20 01:27:37,679 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:27:37,679 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:27:37,679 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 01:27:37,680 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 01:27:37,680 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:27:37,680 INFO L271 CegarLoopResult]: At program point assume_abort_if_notENTRY(lines 5 7) the Hoare annotation is: true [2020-07-20 01:27:37,680 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-07-20 01:27:37,680 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 7) no Hoare annotation was computed. [2020-07-20 01:27:37,680 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2020-07-20 01:27:37,681 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 39 48) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |#memory_int| |old(#memory_int)|)) [2020-07-20 01:27:37,681 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 39 48) no Hoare annotation was computed. [2020-07-20 01:27:37,681 INFO L264 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |main_#t~malloc10.base|)) (= .cse0 (select |#memory_int| main_~a~0.base)))) [2020-07-20 01:27:37,681 INFO L264 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-07-20 01:27:37,681 INFO L268 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-07-20 01:27:37,681 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |#memory_int| |old(#memory_int)|)) [2020-07-20 01:27:37,682 INFO L268 CegarLoopResult]: For program point L43-1(line 43) no Hoare annotation was computed. [2020-07-20 01:27:37,682 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-07-20 01:27:37,682 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 39 48) no Hoare annotation was computed. [2020-07-20 01:27:37,682 INFO L268 CegarLoopResult]: For program point L34-1(line 34) no Hoare annotation was computed. [2020-07-20 01:27:37,682 INFO L271 CegarLoopResult]: At program point checkENTRY(lines 14 37) the Hoare annotation is: true [2020-07-20 01:27:37,683 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (let ((.cse1 (= 0 |check_#in~x|)) (.cse2 ((as const (Array Int Int)) 0))) (or (let ((.cse0 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or (not (<= 1 |check_#in~x|)) .cse0) (or .cse0 (not .cse1)))) (not (= .cse2 (select |#memory_int| |check_#in~a.base|))) (and (let ((.cse3 (<= (+ check_~y 1) check_~n))) (or (and .cse3 (<= 1 check_~x)) (and (<= 0 check_~x) .cse3 .cse1))) (= .cse2 (select |#memory_int| check_~a.base))))) [2020-07-20 01:27:37,683 INFO L268 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-07-20 01:27:37,683 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-07-20 01:27:37,683 INFO L268 CegarLoopResult]: For program point L23(lines 23 24) no Hoare annotation was computed. [2020-07-20 01:27:37,683 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 24) the Hoare annotation is: (let ((.cse1 (= 0 |check_#in~x|)) (.cse2 ((as const (Array Int Int)) 0))) (or (let ((.cse0 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or (not (<= 1 |check_#in~x|)) .cse0) (or .cse0 (not .cse1)))) (not (= .cse2 (select |#memory_int| |check_#in~a.base|))) (and (let ((.cse3 (<= (+ check_~y 1) check_~n))) (or (and .cse3 (<= 1 check_~x)) (and (<= 0 check_~x) .cse3 .cse1))) (= .cse2 (select |#memory_int| check_~a.base))))) [2020-07-20 01:27:37,683 INFO L268 CegarLoopResult]: For program point checkEXIT(lines 14 37) no Hoare annotation was computed. [2020-07-20 01:27:37,684 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (let ((.cse0 (<= 1 |check_#in~x|)) (.cse2 (= 0 |check_#in~x|)) (.cse3 ((as const (Array Int Int)) 0))) (or (let ((.cse1 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or (not .cse0) .cse1) (or .cse1 (not .cse2)))) (not (= .cse3 (select |#memory_int| |check_#in~a.base|))) (and (let ((.cse4 (<= (+ check_~y 1) check_~n))) (or (and .cse0 .cse4 (<= 1 check_~x)) (and (= 0 check_~x) .cse4 .cse2))) (= .cse3 (select |#memory_int| check_~a.base))))) [2020-07-20 01:27:37,684 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-07-20 01:27:37,684 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-07-20 01:27:37,684 INFO L268 CegarLoopResult]: For program point checkFINAL(lines 14 37) no Hoare annotation was computed. [2020-07-20 01:27:37,684 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (let ((.cse1 (= 0 |check_#in~x|)) (.cse3 ((as const (Array Int Int)) 0))) (or (let ((.cse0 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or (not (<= 1 |check_#in~x|)) .cse0) (or .cse0 (not .cse1)))) (and (= 0 check_~ax~0) (let ((.cse2 (<= (+ check_~y 1) check_~n))) (or (and .cse2 (<= 1 check_~x)) (and (<= 0 check_~x) .cse2 .cse1))) (= 0 check_~ai~0) (= .cse3 (select |#memory_int| check_~a.base))) (not (= .cse3 (select |#memory_int| |check_#in~a.base|))))) [2020-07-20 01:27:37,685 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 8 10) the Hoare annotation is: true [2020-07-20 01:27:37,685 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 8 10) no Hoare annotation was computed. [2020-07-20 01:27:37,685 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-20 01:27:37,685 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-07-20 01:27:37,685 INFO L268 CegarLoopResult]: For program point L9-3(lines 8 10) no Hoare annotation was computed. [2020-07-20 01:27:37,685 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-07-20 01:27:37,686 INFO L264 CegarLoopResult]: At program point #Ultimate.meminitENTRY(line -1) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-07-20 01:27:37,686 INFO L268 CegarLoopResult]: For program point #Ultimate.meminitEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:27:37,686 INFO L268 CegarLoopResult]: For program point #Ultimate.meminitFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:27:37,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:27:37 BoogieIcfgContainer [2020-07-20 01:27:37,692 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:27:37,694 INFO L168 Benchmark]: Toolchain (without parser) took 31295.59 ms. Allocated memory was 142.6 MB in the beginning and 249.6 MB in the end (delta: 107.0 MB). Free memory was 100.4 MB in the beginning and 125.7 MB in the end (delta: -25.3 MB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. [2020-07-20 01:27:37,695 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 142.6 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 01:27:37,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.84 ms. Allocated memory is still 142.6 MB. Free memory was 100.2 MB in the beginning and 89.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-20 01:27:37,697 INFO L168 Benchmark]: Boogie Preprocessor took 145.33 ms. Allocated memory was 142.6 MB in the beginning and 202.4 MB in the end (delta: 59.8 MB). Free memory was 89.7 MB in the beginning and 180.4 MB in the end (delta: -90.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:27:37,698 INFO L168 Benchmark]: RCFGBuilder took 415.64 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 162.1 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:27:37,699 INFO L168 Benchmark]: TraceAbstraction took 30447.16 ms. Allocated memory was 202.4 MB in the beginning and 249.6 MB in the end (delta: 47.2 MB). Free memory was 161.4 MB in the beginning and 125.7 MB in the end (delta: 35.7 MB). Peak memory consumption was 82.9 MB. Max. memory is 7.1 GB. [2020-07-20 01:27:37,703 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 142.6 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.84 ms. Allocated memory is still 142.6 MB. Free memory was 100.2 MB in the beginning and 89.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.33 ms. Allocated memory was 142.6 MB in the beginning and 202.4 MB in the end (delta: 59.8 MB). Free memory was 89.7 MB in the beginning and 180.4 MB in the end (delta: -90.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 415.64 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 162.1 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30447.16 ms. Allocated memory was 202.4 MB in the beginning and 249.6 MB in the end (delta: 47.2 MB). Free memory was 161.4 MB in the beginning and 125.7 MB in the end (delta: 35.7 MB). Peak memory consumption was 82.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 29.7s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 19.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 235 SDslu, 234 SDs, 0 SdLazy, 620 SolverSat, 183 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 27.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=2, 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, 4 MinimizatonAttempts, 32 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 36 PreInvPairs, 44 NumberOfFragments, 297 HoareAnnotationTreeSize, 36 FomulaSimplifications, 442 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 521 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 222 NumberOfCodeBlocks, 222 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 216 ConstructedInterpolants, 17 QuantifiedInterpolants, 32653 SizeOfPredicates, 18 NumberOfNonLiveVariables, 355 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 35/54 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...