/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:14:51,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:14:51,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:14:51,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:14:51,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:14:51,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:14:51,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:14:51,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:14:51,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:14:51,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:14:51,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:14:51,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:14:51,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:14:51,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:14:51,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:14:51,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:14:51,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:14:51,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:14:51,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:14:51,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:14:51,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:14:51,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:14:51,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:14:51,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:14:51,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 12:14:51,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:14:51,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:14:51,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:14:51,875 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 12:14:51,897 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:14:51,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:14:51,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:14:51,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:14:51,900 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:14:51,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:14:51,901 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:14:51,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:14:51,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:14:51,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:14:51,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:14:51,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:14:51,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:14:51,902 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:14:51,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:14:51,903 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:14:51,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:14:51,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:14:51,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:14:51,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:14:51,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:14:51,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:14:51,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:14:51,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:14:51,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:14:51,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:14:51,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:14:51,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:14:51,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:14:51,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 12:14:52,310 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:14:52,349 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:14:52,355 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:14:52,357 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:14:52,358 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:14:52,361 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt2.c [2020-07-20 12:14:52,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/843fd5080/42e7e199cfb442f2961e50a7ffe0b95e/FLAGa5fe92245 [2020-07-20 12:14:53,346 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:14:53,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt2.c [2020-07-20 12:14:53,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/843fd5080/42e7e199cfb442f2961e50a7ffe0b95e/FLAGa5fe92245 [2020-07-20 12:14:53,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/843fd5080/42e7e199cfb442f2961e50a7ffe0b95e [2020-07-20 12:14:53,415 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:14:53,420 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:14:53,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:14:53,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:14:53,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:14:53,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:14:53" (1/1) ... [2020-07-20 12:14:53,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dda2912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:14:53, skipping insertion in model container [2020-07-20 12:14:53,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:14:53" (1/1) ... [2020-07-20 12:14:53,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:14:53,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:14:53,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:14:53,817 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:14:53,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:14:53,872 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:14:53,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:14:53 WrapperNode [2020-07-20 12:14:53,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:14:53,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:14:53,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:14:53,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:14:53,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:14:53" (1/1) ... [2020-07-20 12:14:53,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:14:53" (1/1) ... [2020-07-20 12:14:53,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:14:53" (1/1) ... [2020-07-20 12:14:53,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:14:53" (1/1) ... [2020-07-20 12:14:54,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:14:53" (1/1) ... [2020-07-20 12:14:54,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:14:53" (1/1) ... [2020-07-20 12:14:54,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:14:53" (1/1) ... [2020-07-20 12:14:54,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:14:54,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:14:54,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:14:54,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:14:54,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:14:53" (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 12:14:54,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:14:54,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:14:54,277 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:14:54,278 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 12:14:54,278 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:14:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:14:54,280 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:14:54,283 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:14:54,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 12:14:54,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 12:14:54,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:14:54,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:14:54,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:14:54,637 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:14:54,637 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 12:14:54,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:14:54 BoogieIcfgContainer [2020-07-20 12:14:54,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:14:54,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:14:54,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:14:54,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:14:54,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:14:53" (1/3) ... [2020-07-20 12:14:54,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7113a5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:14:54, skipping insertion in model container [2020-07-20 12:14:54,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:14:53" (2/3) ... [2020-07-20 12:14:54,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7113a5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:14:54, skipping insertion in model container [2020-07-20 12:14:54,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:14:54" (3/3) ... [2020-07-20 12:14:54,659 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt2.c [2020-07-20 12:14:54,676 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:14:54,694 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:14:54,719 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:14:54,765 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:14:54,766 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:14:54,766 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:14:54,767 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:14:54,767 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:14:54,767 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:14:54,767 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:14:54,767 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:14:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-20 12:14:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 12:14:54,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:14:54,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:14:54,815 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:14:54,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:14:54,825 INFO L82 PathProgramCache]: Analyzing trace with hash -647006370, now seen corresponding path program 1 times [2020-07-20 12:14:54,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:14:54,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364483405] [2020-07-20 12:14:54,841 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:14:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:14:54,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 12:14:55,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:14:55,052 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 12:14:55,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:14:55,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364483405] [2020-07-20 12:14:55,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:14:55,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 12:14:55,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77443011] [2020-07-20 12:14:55,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 12:14:55,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:14:55,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 12:14:55,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 12:14:55,143 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-20 12:14:55,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:14:55,222 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-20 12:14:55,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 12:14:55,224 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-20 12:14:55,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:14:55,238 INFO L225 Difference]: With dead ends: 34 [2020-07-20 12:14:55,238 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 12:14:55,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 12:14:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 12:14:55,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 12:14:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 12:14:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 12:14:55,331 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-07-20 12:14:55,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:14:55,333 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 12:14:55,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 12:14:55,333 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 12:14:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 12:14:55,334 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:14:55,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:14:55,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:14:55,551 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:14:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:14:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash -657165101, now seen corresponding path program 1 times [2020-07-20 12:14:55,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:14:55,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765531080] [2020-07-20 12:14:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:14:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:14:55,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 12:14:55,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:14:55,746 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 12:14:55,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:14:55,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765531080] [2020-07-20 12:14:55,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:14:55,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:14:55,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58561720] [2020-07-20 12:14:55,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:14:55,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:14:55,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:14:55,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:14:55,755 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-20 12:14:55,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:14:55,889 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-07-20 12:14:55,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:14:55,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 12:14:55,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:14:55,893 INFO L225 Difference]: With dead ends: 28 [2020-07-20 12:14:55,893 INFO L226 Difference]: Without dead ends: 17 [2020-07-20 12:14:55,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 12:14:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-20 12:14:55,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-20 12:14:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 12:14:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-07-20 12:14:55,907 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2020-07-20 12:14:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:14:55,908 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-07-20 12:14:55,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:14:55,908 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-07-20 12:14:55,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 12:14:55,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:14:55,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:14:56,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:14:56,127 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:14:56,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:14:56,128 INFO L82 PathProgramCache]: Analyzing trace with hash 523159493, now seen corresponding path program 1 times [2020-07-20 12:14:56,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:14:56,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852890582] [2020-07-20 12:14:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:14:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:14:56,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 12:14:56,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:14:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:14:56,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:14:56,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:14:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:14:57,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852890582] [2020-07-20 12:14:57,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:14:57,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 12:14:57,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062265546] [2020-07-20 12:14:57,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 12:14:57,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:14:57,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 12:14:57,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-20 12:14:57,045 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 14 states. [2020-07-20 12:15:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:15:03,734 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-20 12:15:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 12:15:03,752 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-07-20 12:15:03,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:15:03,760 INFO L225 Difference]: With dead ends: 34 [2020-07-20 12:15:03,760 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 12:15:03,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-07-20 12:15:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 12:15:03,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 12:15:03,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 12:15:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-20 12:15:03,778 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2020-07-20 12:15:03,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:15:03,779 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-20 12:15:03,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 12:15:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-20 12:15:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 12:15:03,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:15:03,781 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:15:03,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:15:03,985 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:15:03,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:15:03,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1817505603, now seen corresponding path program 1 times [2020-07-20 12:15:03,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:15:03,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115967268] [2020-07-20 12:15:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:15:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:15:04,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 12:15:04,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:15:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:15:04,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:15:04,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:15:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:15:08,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115967268] [2020-07-20 12:15:08,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:15:08,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-20 12:15:08,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014047338] [2020-07-20 12:15:08,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 12:15:08,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:15:08,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 12:15:08,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=368, Unknown=1, NotChecked=0, Total=462 [2020-07-20 12:15:08,328 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 22 states. [2020-07-20 12:15:09,224 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 12:15:18,460 WARN L193 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 25 DAG size of output: 9 [2020-07-20 12:15:27,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:15:27,284 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-07-20 12:15:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 12:15:27,285 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-07-20 12:15:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:15:27,287 INFO L225 Difference]: With dead ends: 47 [2020-07-20 12:15:27,288 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 12:15:27,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=151, Invalid=602, Unknown=3, NotChecked=0, Total=756 [2020-07-20 12:15:27,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 12:15:27,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-20 12:15:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 12:15:27,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-07-20 12:15:27,300 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 21 [2020-07-20 12:15:27,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:15:27,301 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-07-20 12:15:27,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 12:15:27,301 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-07-20 12:15:27,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 12:15:27,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:15:27,303 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:15:27,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:15:27,507 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:15:27,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:15:27,508 INFO L82 PathProgramCache]: Analyzing trace with hash 392231041, now seen corresponding path program 2 times [2020-07-20 12:15:27,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:15:27,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725147608] [2020-07-20 12:15:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:15:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:15:27,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-20 12:15:27,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:15:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:15:28,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:15:28,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:16:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:16:26,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725147608] [2020-07-20 12:16:26,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:16:26,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2020-07-20 12:16:26,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556399515] [2020-07-20 12:16:26,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-20 12:16:26,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:16:26,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-20 12:16:26,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1151, Unknown=26, NotChecked=0, Total=1406 [2020-07-20 12:16:26,170 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 38 states. [2020-07-20 12:18:22,226 WARN L193 SmtUtils]: Spent 1.85 m on a formula simplification. DAG size of input: 125 DAG size of output: 31 [2020-07-20 12:19:41,619 WARN L193 SmtUtils]: Spent 1.14 m on a formula simplification. DAG size of input: 116 DAG size of output: 28 [2020-07-20 12:21:04,429 WARN L193 SmtUtils]: Spent 1.22 m on a formula simplification. DAG size of input: 134 DAG size of output: 20 [2020-07-20 12:22:04,742 WARN L193 SmtUtils]: Spent 55.43 s on a formula simplification. DAG size of input: 118 DAG size of output: 28 [2020-07-20 12:22:55,753 WARN L193 SmtUtils]: Spent 33.70 s on a formula simplification. DAG size of input: 87 DAG size of output: 12 [2020-07-20 12:23:37,918 WARN L193 SmtUtils]: Spent 25.05 s on a formula simplification. DAG size of input: 87 DAG size of output: 26 [2020-07-20 12:24:40,507 WARN L193 SmtUtils]: Spent 38.11 s on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2020-07-20 12:27:11,259 WARN L193 SmtUtils]: Spent 1.77 m on a formula simplification. DAG size of input: 103 DAG size of output: 52 [2020-07-20 12:28:07,277 WARN L193 SmtUtils]: Spent 18.57 s on a formula simplification. DAG size of input: 47 DAG size of output: 12 [2020-07-20 12:28:09,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:28:09,429 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-20 12:28:09,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 12:28:09,431 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 33 [2020-07-20 12:28:09,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:28:09,432 INFO L225 Difference]: With dead ends: 50 [2020-07-20 12:28:09,432 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 12:28:09,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 714.8s TimeCoverageRelationStatistics Valid=394, Invalid=1798, Unknown=64, NotChecked=0, Total=2256 [2020-07-20 12:28:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 12:28:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 12:28:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 12:28:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 12:28:09,435 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-07-20 12:28:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:28:09,435 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 12:28:09,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-20 12:28:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 12:28:09,435 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 12:28:09,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:28:09,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 12:29:11,965 WARN L193 SmtUtils]: Spent 1.04 m on a formula simplification. DAG size of input: 150 DAG size of output: 35 [2020-07-20 12:29:11,968 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 12:29:11,968 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 12:29:11,969 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 12:29:11,969 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 12:29:11,969 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 12:29:11,969 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 12:29:11,969 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 12:29:11,969 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 12:29:11,970 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 12:29:11,970 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 12:29:11,970 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 12:29:11,970 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 31) the Hoare annotation is: true [2020-07-20 12:29:11,970 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-07-20 12:29:11,970 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 31) no Hoare annotation was computed. [2020-07-20 12:29:11,971 INFO L268 CegarLoopResult]: For program point L23(lines 23 26) no Hoare annotation was computed. [2020-07-20 12:29:11,971 INFO L268 CegarLoopResult]: For program point L23-2(lines 23 26) no Hoare annotation was computed. [2020-07-20 12:29:11,971 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 28) the Hoare annotation is: (or (= (mod (+ main_~j~0 main_~i~0) 4294967296) (mod main_~l~0 4294967296)) (and (= (mod (+ main_~j~0 main_~i~0 5) 4294967296) (mod (+ main_~l~0 5) 4294967296)) (= (mod (+ main_~l~0 6) 4294967296) (mod (+ main_~j~0 main_~i~0 6) 4294967296)) (= (mod (+ main_~l~0 4) 4294967296) (mod (+ main_~j~0 main_~i~0 4) 4294967296)))) [2020-07-20 12:29:11,971 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 28) the Hoare annotation is: (= (mod main_~l~0 4294967296) (mod (+ main_~j~0 main_~i~0) 4294967296)) [2020-07-20 12:29:11,971 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-20 12:29:11,971 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 31) no Hoare annotation was computed. [2020-07-20 12:29:11,971 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 12:29:11,972 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 12:29:11,972 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 12:29:11,972 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 12:29:11,972 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 12:29:11,972 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 12:29:11,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 12:29:11 BoogieIcfgContainer [2020-07-20 12:29:11,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 12:29:11,999 INFO L168 Benchmark]: Toolchain (without parser) took 858574.47 ms. Allocated memory was 134.7 MB in the beginning and 279.4 MB in the end (delta: 144.7 MB). Free memory was 99.4 MB in the beginning and 238.2 MB in the end (delta: -138.8 MB). Peak memory consumption was 154.2 MB. Max. memory is 7.1 GB. [2020-07-20 12:29:12,000 INFO L168 Benchmark]: CDTParser took 0.88 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 12:29:12,001 INFO L168 Benchmark]: CACSL2BoogieTranslator took 453.45 ms. Allocated memory is still 134.7 MB. Free memory was 99.0 MB in the beginning and 89.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 12:29:12,002 INFO L168 Benchmark]: Boogie Preprocessor took 253.35 ms. Allocated memory was 134.7 MB in the beginning and 202.9 MB in the end (delta: 68.2 MB). Free memory was 89.4 MB in the beginning and 181.5 MB in the end (delta: -92.2 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-20 12:29:12,003 INFO L168 Benchmark]: RCFGBuilder took 514.65 ms. Allocated memory is still 202.9 MB. Free memory was 181.5 MB in the beginning and 168.7 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-07-20 12:29:12,004 INFO L168 Benchmark]: TraceAbstraction took 857342.93 ms. Allocated memory was 202.9 MB in the beginning and 279.4 MB in the end (delta: 76.5 MB). Free memory was 168.0 MB in the beginning and 238.2 MB in the end (delta: -70.2 MB). Peak memory consumption was 154.6 MB. Max. memory is 7.1 GB. [2020-07-20 12:29:12,012 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.88 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 453.45 ms. Allocated memory is still 134.7 MB. Free memory was 99.0 MB in the beginning and 89.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 253.35 ms. Allocated memory was 134.7 MB in the beginning and 202.9 MB in the end (delta: 68.2 MB). Free memory was 89.4 MB in the beginning and 181.5 MB in the end (delta: -92.2 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 514.65 ms. Allocated memory is still 202.9 MB. Free memory was 181.5 MB in the beginning and 168.7 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 857342.93 ms. Allocated memory was 202.9 MB in the beginning and 279.4 MB in the end (delta: 76.5 MB). Free memory was 168.0 MB in the beginning and 238.2 MB in the end (delta: -70.2 MB). Peak memory consumption was 154.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 21]: Loop Invariant Derived loop invariant: (j + i) % 4294967296 == l % 4294967296 || (((j + i + 5) % 4294967296 == (l + 5) % 4294967296 && (l + 6) % 4294967296 == (j + i + 6) % 4294967296) && (l + 4) % 4294967296 == (j + i + 4) % 4294967296) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 794.8s, OverallIterations: 5, TraceHistogramMax: 7, AutomataDifference: 729.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 62.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 49 SDslu, 289 SDs, 0 SdLazy, 641 SolverSat, 91 SolverUnsat, 30 SolverUnknown, 0 SolverNotchecked, 62.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 727.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 7 LocationsWithAnnotation, 18 PreInvPairs, 34 NumberOfFragments, 61 HoareAnnotationTreeSize, 18 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 358 FormulaSimplificationTreeSizeReductionInter, 62.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 63.9s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 154 ConstructedInterpolants, 18 QuantifiedInterpolants, 42042 SizeOfPredicates, 16 NumberOfNonLiveVariables, 259 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/166 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...