/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:45:57,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:45:57,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:45:57,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 16:45:57,318 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 [2020-08-22 16:45:57,368 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:45:57,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:45:57,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:45:57,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:45:57,370 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:45:57,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:45:57,374 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:45:57,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:45:57,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:45:57,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:45:57,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:45:57,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:45:57,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:45:57,375 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:45:57,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:45:57,376 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:45:57,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:45:57,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:45:57,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:45:57,377 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:45:57,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:45:57,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:45:57,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:45:57,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:45:57,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:45:57,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:45:57,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:45:57,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:45:57,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:45:57,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:45:57,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:45:57,778 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:45:57,782 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:45:57,783 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:45:57,784 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:45:57,784 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-1.c [2020-08-22 16:45:57,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8118a3e6/16be30c569104837b8ae7549ff93ca41/FLAGb80e05eab [2020-08-22 16:45:58,392 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:45:58,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-1.c [2020-08-22 16:45:58,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8118a3e6/16be30c569104837b8ae7549ff93ca41/FLAGb80e05eab [2020-08-22 16:45:58,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8118a3e6/16be30c569104837b8ae7549ff93ca41 [2020-08-22 16:45:58,761 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:45:58,763 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:45:58,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:45:58,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:45:58,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:45:58,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:45:58" (1/1) ... [2020-08-22 16:45:58,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10995e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:45:58, skipping insertion in model container [2020-08-22 16:45:58,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:45:58" (1/1) ... [2020-08-22 16:45:58,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:45:58,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:45:58,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:45:58,990 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:45:59,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:45:59,113 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:45:59,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:45:59 WrapperNode [2020-08-22 16:45:59,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:45:59,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:45:59,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:45:59,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:45:59,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:45:59" (1/1) ... [2020-08-22 16:45:59,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:45:59" (1/1) ... [2020-08-22 16:45:59,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:45:59" (1/1) ... [2020-08-22 16:45:59,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:45:59" (1/1) ... [2020-08-22 16:45:59,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:45:59" (1/1) ... [2020-08-22 16:45:59,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:45:59" (1/1) ... [2020-08-22 16:45:59,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:45:59" (1/1) ... [2020-08-22 16:45:59,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:45:59,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:45:59,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:45:59,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:45:59,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:45:59" (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 [2020-08-22 16:45:59,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:45:59,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:45:59,220 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-22 16:45:59,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:45:59,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:45:59,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:45:59,221 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 16:45:59,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:45:59,221 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:45:59,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:45:59,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:45:59,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:45:59,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:45:59,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:45:59,503 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:45:59,504 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 16:45:59,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:45:59 BoogieIcfgContainer [2020-08-22 16:45:59,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:45:59,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:45:59,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:45:59,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:45:59,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:45:58" (1/3) ... [2020-08-22 16:45:59,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4168e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:45:59, skipping insertion in model container [2020-08-22 16:45:59,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:45:59" (2/3) ... [2020-08-22 16:45:59,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4168e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:45:59, skipping insertion in model container [2020-08-22 16:45:59,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:45:59" (3/3) ... [2020-08-22 16:45:59,518 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-1.c [2020-08-22 16:45:59,530 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:45:59,539 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:45:59,557 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:45:59,613 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:45:59,613 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:45:59,613 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:45:59,614 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:45:59,614 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:45:59,614 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:45:59,615 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:45:59,615 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:45:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-08-22 16:45:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 16:45:59,640 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:45:59,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:45:59,641 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:45:59,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:45:59,649 INFO L82 PathProgramCache]: Analyzing trace with hash 149844724, now seen corresponding path program 1 times [2020-08-22 16:45:59,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:45:59,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497881525] [2020-08-22 16:45:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:45:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:45:59,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:45:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:45:59,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 16:45:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:45:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:45:59,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497881525] [2020-08-22 16:45:59,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:45:59,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:45:59,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844613853] [2020-08-22 16:45:59,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:45:59,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:45:59,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:45:59,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:45:59,912 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-08-22 16:46:00,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:46:00,019 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-08-22 16:46:00,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:46:00,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-22 16:46:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:46:00,036 INFO L225 Difference]: With dead ends: 35 [2020-08-22 16:46:00,036 INFO L226 Difference]: Without dead ends: 17 [2020-08-22 16:46:00,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:46:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-22 16:46:00,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-22 16:46:00,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-22 16:46:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-08-22 16:46:00,076 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-08-22 16:46:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:46:00,077 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-08-22 16:46:00,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:46:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-08-22 16:46:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 16:46:00,078 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:46:00,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:46:00,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:46:00,079 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:46:00,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:46:00,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1249419983, now seen corresponding path program 1 times [2020-08-22 16:46:00,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:46:00,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636310527] [2020-08-22 16:46:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:46:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:00,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:46:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:00,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 16:46:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:46:00,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636310527] [2020-08-22 16:46:00,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:46:00,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:46:00,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653192443] [2020-08-22 16:46:00,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:46:00,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:46:00,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:46:00,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:46:00,263 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-08-22 16:46:00,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:46:00,353 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-08-22 16:46:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:46:00,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 16:46:00,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:46:00,355 INFO L225 Difference]: With dead ends: 27 [2020-08-22 16:46:00,355 INFO L226 Difference]: Without dead ends: 19 [2020-08-22 16:46:00,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:46:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-22 16:46:00,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-22 16:46:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-22 16:46:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-08-22 16:46:00,364 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-08-22 16:46:00,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:46:00,365 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-08-22 16:46:00,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:46:00,365 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-08-22 16:46:00,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 16:46:00,366 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:46:00,366 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:46:00,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:46:00,367 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:46:00,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:46:00,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1840889772, now seen corresponding path program 1 times [2020-08-22 16:46:00,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:46:00,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194097492] [2020-08-22 16:46:00,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:46:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:00,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:46:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:00,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 16:46:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:46:00,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194097492] [2020-08-22 16:46:00,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325183265] [2020-08-22 16:46:00,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:46:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:00,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2020-08-22 16:46:00,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:46:00,787 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 17 treesize of output 9 [2020-08-22 16:46:00,794 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:46:00,799 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:46:00,800 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:46:00,801 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2020-08-22 16:46:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:46:00,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:46:00,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2020-08-22 16:46:00,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762830927] [2020-08-22 16:46:00,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:46:00,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:46:00,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:46:00,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:46:00,831 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2020-08-22 16:46:00,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:46:00,980 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-08-22 16:46:00,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:46:00,981 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-22 16:46:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:46:00,982 INFO L225 Difference]: With dead ends: 29 [2020-08-22 16:46:00,982 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 16:46:00,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:46:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 16:46:00,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 16:46:00,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 16:46:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-08-22 16:46:00,994 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-08-22 16:46:00,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:46:00,997 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-08-22 16:46:00,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:46:00,998 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-08-22 16:46:01,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:46:01,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:46:01,001 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:46:01,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-08-22 16:46:01,216 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:46:01,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:46:01,217 INFO L82 PathProgramCache]: Analyzing trace with hash -488804505, now seen corresponding path program 2 times [2020-08-22 16:46:01,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:46:01,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104987905] [2020-08-22 16:46:01,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:46:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:01,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:46:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:01,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 16:46:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:46:01,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104987905] [2020-08-22 16:46:01,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398111966] [2020-08-22 16:46:01,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-08-22 16:46:01,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:46:01,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:46:01,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2020-08-22 16:46:01,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:46:01,552 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 17 treesize of output 9 [2020-08-22 16:46:01,554 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:46:01,556 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:46:01,557 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:46:01,557 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2020-08-22 16:46:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:46:01,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:46:01,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2020-08-22 16:46:01,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569032238] [2020-08-22 16:46:01,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:46:01,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:46:01,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:46:01,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:46:01,568 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 7 states. [2020-08-22 16:46:01,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:46:01,661 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-08-22 16:46:01,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:46:01,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-22 16:46:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:46:01,663 INFO L225 Difference]: With dead ends: 31 [2020-08-22 16:46:01,663 INFO L226 Difference]: Without dead ends: 23 [2020-08-22 16:46:01,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:46:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-22 16:46:01,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-22 16:46:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 16:46:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-08-22 16:46:01,670 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-08-22 16:46:01,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:46:01,670 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-08-22 16:46:01,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:46:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-08-22 16:46:01,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:46:01,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:46:01,672 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:46:01,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:46:01,873 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:46:01,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:46:01,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1647043486, now seen corresponding path program 3 times [2020-08-22 16:46:01,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:46:01,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898453179] [2020-08-22 16:46:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:46:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:01,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:46:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:01,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 16:46:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:46:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:46:01,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898453179] [2020-08-22 16:46:01,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761500739] [2020-08-22 16:46:01,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:46:02,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-08-22 16:46:02,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:46:02,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 29 conjunts are in the unsatisfiable core [2020-08-22 16:46:02,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:46:02,053 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 25 treesize of output 21 [2020-08-22 16:46:02,054 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:46:02,065 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:46:02,065 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:46:02,066 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-08-22 16:46:04,291 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#ad1~0.base_BEFORE_CALL_1| Int) (|v_main_~#ad1~0.offset_BEFORE_CALL_1| Int) (aux_div_57 Int)) (= (+ |v_main_~#ad1~0.offset_BEFORE_CALL_1| (select (select |c_#memory_int| |v_main_~#ad1~0.base_BEFORE_CALL_1|) (+ |v_main_~#ad1~0.offset_BEFORE_CALL_1| (* (div (+ (* |v_main_~#ad1~0.offset_BEFORE_CALL_1| (- 8)) (* aux_div_57 8)) 8) 8)))) aux_div_57)) is different from true [2020-08-22 16:46:12,483 WARN L193 SmtUtils]: Spent 8.13 s on a formula simplification that was a NOOP. DAG size: 34 [2020-08-22 16:46:20,631 WARN L193 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 48 [2020-08-22 16:46:20,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:46:20,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:46:20,668 WARN L313 ript$VariableManager]: TermVariabe aux_div_57 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-08-22 16:46:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 16:46:20,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:46:20,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2020-08-22 16:46:20,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431404029] [2020-08-22 16:46:20,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 16:46:20,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:46:20,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 16:46:20,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=228, Unknown=2, NotChecked=30, Total=306 [2020-08-22 16:46:20,725 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 18 states. [2020-08-22 16:46:21,150 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-08-22 16:46:21,457 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-08-22 16:46:26,146 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 27 [2020-08-22 16:46:34,274 WARN L193 SmtUtils]: Spent 8.09 s on a formula simplification that was a NOOP. DAG size: 44 [2020-08-22 16:46:34,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:46:34,426 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 16:46:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 16:46:34,427 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-08-22 16:46:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:46:34,428 INFO L225 Difference]: With dead ends: 31 [2020-08-22 16:46:34,428 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:46:34,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=165, Invalid=706, Unknown=3, NotChecked=56, Total=930 [2020-08-22 16:46:34,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:46:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:46:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:46:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:46:34,431 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-08-22 16:46:34,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:46:34,431 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:46:34,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 16:46:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:46:34,432 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:46:34,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:46:34,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:46:34,797 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:46:34,797 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-22 16:46:34,797 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:46:34,797 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:46:34,798 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:46:34,798 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:46:34,798 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:46:34,798 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-08-22 16:46:34,798 INFO L268 CegarLoopResult]: For program point L29-1(lines 29 31) no Hoare annotation was computed. [2020-08-22 16:46:34,798 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 38) no Hoare annotation was computed. [2020-08-22 16:46:34,798 INFO L268 CegarLoopResult]: For program point L21(lines 21 32) no Hoare annotation was computed. [2020-08-22 16:46:34,799 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 32) no Hoare annotation was computed. [2020-08-22 16:46:34,799 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 38) no Hoare annotation was computed. [2020-08-22 16:46:34,799 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 36) no Hoare annotation was computed. [2020-08-22 16:46:34,799 INFO L264 CegarLoopResult]: At program point L30(lines 15 38) the Hoare annotation is: false [2020-08-22 16:46:34,799 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 14 38) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-22 16:46:34,800 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 28) no Hoare annotation was computed. [2020-08-22 16:46:34,800 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 28) the Hoare annotation is: (and (= main_~pa~0.base |main_~#ad1~0.base|) (let ((.cse0 (div (+ main_~pa~0.offset (* |main_~#ad1~0.offset| (- 1))) 8))) (= (select (select |#memory_int| |main_~#ad1~0.base|) (+ (* .cse0 8) |main_~#ad1~0.offset|)) .cse0)) (= (mod (+ main_~pa~0.offset (* |main_~#ad1~0.offset| 7)) 8) 0) (<= main_~i~0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset))) [2020-08-22 16:46:34,800 INFO L264 CegarLoopResult]: At program point L26-4(lines 26 28) the Hoare annotation is: (and (exists ((aux_div_57 Int)) (let ((.cse1 (select |#memory_int| |main_~#ad1~0.base|)) (.cse2 (* aux_div_57 8))) (let ((.cse0 (select .cse1 (+ (* |main_~#ad1~0.offset| (- 7)) .cse2)))) (and (<= .cse0 main_~i~0) (= aux_div_57 (+ (select .cse1 (+ (* (div (+ (* |main_~#ad1~0.offset| (- 8)) .cse2) 8) 8) |main_~#ad1~0.offset|)) |main_~#ad1~0.offset|)) (<= main_~i~0 .cse0))))) (= main_~pa~0.base |main_~#ad1~0.base|) (= (mod (+ main_~pa~0.offset (* |main_~#ad1~0.offset| 7)) 8) 0) (= (div (+ main_~pa~0.offset (* |main_~#ad1~0.offset| (- 1))) 8) (select (select |#memory_int| |main_~#ad1~0.base|) (+ (* (div (+ main_~pa~0.offset (- |main_~#ad1~0.offset|)) 8) 8) |main_~#ad1~0.offset|))) (<= main_~i~0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset))) [2020-08-22 16:46:34,800 INFO L271 CegarLoopResult]: At program point checkENTRY(lines 9 12) the Hoare annotation is: true [2020-08-22 16:46:34,800 INFO L268 CegarLoopResult]: For program point checkFINAL(lines 9 12) no Hoare annotation was computed. [2020-08-22 16:46:34,801 INFO L268 CegarLoopResult]: For program point checkEXIT(lines 9 12) no Hoare annotation was computed. [2020-08-22 16:46:34,813 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-22 16:46:34,814 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-22 16:46:34,820 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-22 16:46:34,821 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-22 16:46:34,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:46:34 BoogieIcfgContainer [2020-08-22 16:46:34,824 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:46:34,826 INFO L168 Benchmark]: Toolchain (without parser) took 36063.82 ms. Allocated memory was 137.4 MB in the beginning and 250.6 MB in the end (delta: 113.2 MB). Free memory was 100.5 MB in the beginning and 132.5 MB in the end (delta: -32.0 MB). Peak memory consumption was 81.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:34,827 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:46:34,828 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.38 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 100.3 MB in the beginning and 178.7 MB in the end (delta: -78.4 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:34,829 INFO L168 Benchmark]: Boogie Preprocessor took 38.06 ms. Allocated memory is still 199.8 MB. Free memory was 178.7 MB in the beginning and 176.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:34,830 INFO L168 Benchmark]: RCFGBuilder took 355.22 ms. Allocated memory is still 199.8 MB. Free memory was 176.8 MB in the beginning and 161.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:34,831 INFO L168 Benchmark]: TraceAbstraction took 35314.24 ms. Allocated memory was 199.8 MB in the beginning and 250.6 MB in the end (delta: 50.9 MB). Free memory was 160.9 MB in the beginning and 132.5 MB in the end (delta: 28.3 MB). Peak memory consumption was 79.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:46:34,835 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 350.38 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 100.3 MB in the beginning and 178.7 MB in the end (delta: -78.4 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.06 ms. Allocated memory is still 199.8 MB. Free memory was 178.7 MB in the beginning and 176.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 355.22 ms. Allocated memory is still 199.8 MB. Free memory was 176.8 MB in the beginning and 161.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 35314.24 ms. Allocated memory was 199.8 MB in the beginning and 250.6 MB in the end (delta: 50.9 MB). Free memory was 160.9 MB in the beginning and 132.5 MB in the end (delta: 28.3 MB). Peak memory consumption was 79.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: 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: 26]: Loop Invariant [2020-08-22 16:46:34,845 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-22 16:46:34,845 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-22 16:46:34,846 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-08-22 16:46:34,846 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((pa == ad1 && unknown-#memory_int-unknown[ad1][(pa + ad1 * -1) / 8 * 8 + ad1] == (pa + ad1 * -1) / 8) && (pa + ad1 * 7) % 8 == 0) && i <= unknown-#memory_int-unknown[pa][pa] - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 35.0s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 14.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 67 SDtfs, 29 SDslu, 144 SDs, 0 SdLazy, 253 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 32.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 13 PreInvPairs, 18 NumberOfFragments, 151 HoareAnnotationTreeSize, 13 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 251 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 19.5s InterpolantComputationTime, 151 NumberOfCodeBlocks, 149 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 143 ConstructedInterpolants, 5 QuantifiedInterpolants, 18424 SizeOfPredicates, 27 NumberOfNonLiveVariables, 265 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 9/40 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...