/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:23:24,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:23:24,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:23:24,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:23:24,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:23:24,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:23:24,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:23:24,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:23:24,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:23:24,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:23:24,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:23:24,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:23:24,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:23:24,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:23:24,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:23:24,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:23:24,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:23:24,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:23:24,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:23:24,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:23:24,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:23:24,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:23:24,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:23:24,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:23:24,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:23:24,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:23:24,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:23:24,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:23:24,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 23:23:24,682 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:23:24,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:23:24,684 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:23:24,684 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:23:24,684 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:23:24,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:23:24,685 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:23:24,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:23:24,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:23:24,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:23:24,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:23:24,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:23:24,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:23:24,686 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:23:24,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:23:24,687 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:23:24,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:23:24,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:23:24,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:23:24,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:23:24,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:23:24,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:23:24,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:23:24,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:23:24,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:23:24,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:23:24,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:24,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:23:24,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:23:24,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:23:25,035 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:23:25,050 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:23:25,053 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:23:25,055 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:23:25,055 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:23:25,056 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-07-21 23:23:25,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3df3260a/1405d63a9e5d4fd18e9bd766975da3d9/FLAGd878aa6c5 [2020-07-21 23:23:25,577 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:23:25,579 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-07-21 23:23:25,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3df3260a/1405d63a9e5d4fd18e9bd766975da3d9/FLAGd878aa6c5 [2020-07-21 23:23:25,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3df3260a/1405d63a9e5d4fd18e9bd766975da3d9 [2020-07-21 23:23:25,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:23:25,988 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:23:25,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:23:25,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:23:25,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:23:25,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:25" (1/1) ... [2020-07-21 23:23:25,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79934605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:25, skipping insertion in model container [2020-07-21 23:23:25,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:25" (1/1) ... [2020-07-21 23:23:26,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:23:26,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:23:26,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:23:26,206 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:23:26,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:23:26,239 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:23:26,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:26 WrapperNode [2020-07-21 23:23:26,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:23:26,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:23:26,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:23:26,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:23:26,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:26" (1/1) ... [2020-07-21 23:23:26,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:26" (1/1) ... [2020-07-21 23:23:26,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:26" (1/1) ... [2020-07-21 23:23:26,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:26" (1/1) ... [2020-07-21 23:23:26,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:26" (1/1) ... [2020-07-21 23:23:26,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:26" (1/1) ... [2020-07-21 23:23:26,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:26" (1/1) ... [2020-07-21 23:23:26,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:23:26,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:23:26,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:23:26,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:23:26,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:23:26,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:23:26,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:23:26,428 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:23:26,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:23:26,428 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:23:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:23:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:23:26,429 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:23:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:23:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:23:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:23:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:23:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:23:26,644 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:23:26,645 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:23:26,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:26 BoogieIcfgContainer [2020-07-21 23:23:26,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:23:26,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:23:26,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:23:26,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:23:26,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:23:25" (1/3) ... [2020-07-21 23:23:26,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2696a5ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:26, skipping insertion in model container [2020-07-21 23:23:26,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:26" (2/3) ... [2020-07-21 23:23:26,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2696a5ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:26, skipping insertion in model container [2020-07-21 23:23:26,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:26" (3/3) ... [2020-07-21 23:23:26,657 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-07-21 23:23:26,668 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:23:26,676 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:23:26,692 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:23:26,759 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:23:26,760 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:23:26,760 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:23:26,760 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:23:26,760 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:23:26,761 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:23:26,761 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:23:26,761 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:23:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-21 23:23:26,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 23:23:26,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:26,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:26,798 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:26,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:26,805 INFO L82 PathProgramCache]: Analyzing trace with hash -917653371, now seen corresponding path program 1 times [2020-07-21 23:23:26,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:26,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669733280] [2020-07-21 23:23:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:26,883 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:23:26,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:26,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:23:26,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:26,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:23:26,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669733280] [2020-07-21 23:23:26,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:23:26,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:23:26,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964893024] [2020-07-21 23:23:26,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:23:26,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:26,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:23:26,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:23:26,931 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-21 23:23:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:26,951 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-07-21 23:23:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:23:26,953 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-21 23:23:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:26,961 INFO L225 Difference]: With dead ends: 35 [2020-07-21 23:23:26,961 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 23:23:26,965 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 [2020-07-21 23:23:26,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 23:23:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 23:23:26,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 23:23:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-07-21 23:23:26,998 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-07-21 23:23:26,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:26,999 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-07-21 23:23:26,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:23:26,999 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-07-21 23:23:27,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 23:23:27,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:27,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:27,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:27,208 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1750778295, now seen corresponding path program 1 times [2020-07-21 23:23:27,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:27,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592241408] [2020-07-21 23:23:27,210 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:27,244 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:23:27,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:27,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:23:27,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:27,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:23:27,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592241408] [2020-07-21 23:23:27,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:23:27,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:23:27,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688398384] [2020-07-21 23:23:27,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:23:27,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:23:27,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:23:27,277 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-07-21 23:23:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:27,290 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-07-21 23:23:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:23:27,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-21 23:23:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:27,292 INFO L225 Difference]: With dead ends: 24 [2020-07-21 23:23:27,292 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 23:23:27,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:23:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 23:23:27,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 23:23:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 23:23:27,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 23:23:27,298 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-07-21 23:23:27,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:27,298 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 23:23:27,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:23:27,299 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 23:23:27,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 23:23:27,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:27,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:27,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:27,502 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:27,503 INFO L82 PathProgramCache]: Analyzing trace with hash -941431669, now seen corresponding path program 1 times [2020-07-21 23:23:27,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:27,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135217409] [2020-07-21 23:23:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 23:23:27,535 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:23:27,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:27,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 23:23:27,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:27,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:23:27,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135217409] [2020-07-21 23:23:27,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:23:27,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:23:27,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884525072] [2020-07-21 23:23:27,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:23:27,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:27,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:23:27,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:23:27,599 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-21 23:23:27,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:27,640 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-07-21 23:23:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:23:27,641 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 23:23:27,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:27,642 INFO L225 Difference]: With dead ends: 23 [2020-07-21 23:23:27,642 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 23:23:27,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:23:27,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 23:23:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 23:23:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 23:23:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-07-21 23:23:27,648 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-07-21 23:23:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:27,648 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-07-21 23:23:27,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:23:27,649 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-07-21 23:23:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 23:23:27,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:27,650 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:27,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:27,851 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:27,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:27,852 INFO L82 PathProgramCache]: Analyzing trace with hash 447870728, now seen corresponding path program 1 times [2020-07-21 23:23:27,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:27,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916004522] [2020-07-21 23:23:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 23:23:27,890 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:23:27,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:27,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:23:27,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:27,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:23:27,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916004522] [2020-07-21 23:23:27,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:23:27,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:23:27,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759089027] [2020-07-21 23:23:27,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:23:27,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:27,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:23:27,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:23:27,913 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-07-21 23:23:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:27,936 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-07-21 23:23:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:23:27,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-21 23:23:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:27,939 INFO L225 Difference]: With dead ends: 31 [2020-07-21 23:23:27,939 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 23:23:27,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:23:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 23:23:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-07-21 23:23:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 23:23:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 23:23:27,945 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-07-21 23:23:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:27,946 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 23:23:27,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:23:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 23:23:27,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 23:23:27,947 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:27,947 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:28,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:28,162 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:28,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1257217354, now seen corresponding path program 1 times [2020-07-21 23:23:28,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:28,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41813425] [2020-07-21 23:23:28,165 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 23:23:28,201 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:23:28,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:28,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 23:23:28,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:28,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:28,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:23:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:28,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41813425] [2020-07-21 23:23:28,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:28,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 23:23:28,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159698017] [2020-07-21 23:23:28,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 23:23:28,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:28,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 23:23:28,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:23:28,427 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-07-21 23:23:28,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:28,508 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-07-21 23:23:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:23:28,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-07-21 23:23:28,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:28,510 INFO L225 Difference]: With dead ends: 26 [2020-07-21 23:23:28,510 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 23:23:28,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:23:28,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 23:23:28,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 23:23:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 23:23:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-21 23:23:28,515 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-07-21 23:23:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:28,515 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-21 23:23:28,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 23:23:28,515 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-21 23:23:28,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 23:23:28,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:28,516 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:28,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:28,727 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:28,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2145316375, now seen corresponding path program 1 times [2020-07-21 23:23:28,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:28,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772240141] [2020-07-21 23:23:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:28,763 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:23:28,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:28,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:23:28,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:28,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 23:23:28,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772240141] [2020-07-21 23:23:28,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 23:23:28,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-07-21 23:23:28,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108259139] [2020-07-21 23:23:28,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:23:28,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:28,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:23:28,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:23:28,845 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2020-07-21 23:23:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:28,861 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-07-21 23:23:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:23:28,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 23:23:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:28,863 INFO L225 Difference]: With dead ends: 29 [2020-07-21 23:23:28,864 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 23:23:28,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:23:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 23:23:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 23:23:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 23:23:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-21 23:23:28,871 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 19 [2020-07-21 23:23:28,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:28,872 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-21 23:23:28,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:23:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-21 23:23:28,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 23:23:28,873 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:23:28,874 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:23:29,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:29,089 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:23:29,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:23:29,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1335969749, now seen corresponding path program 2 times [2020-07-21 23:23:29,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:23:29,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323375703] [2020-07-21 23:23:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:29,139 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:23:29,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:23:29,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 23:23:29,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:23:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:29,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:23:29,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:23:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:23:29,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323375703] [2020-07-21 23:23:29,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:23:29,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 23:23:29,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891043421] [2020-07-21 23:23:29,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 23:23:29,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:23:29,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 23:23:29,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-07-21 23:23:29,481 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 14 states. [2020-07-21 23:23:41,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:23:41,560 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-21 23:23:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 23:23:41,608 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-07-21 23:23:41,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:23:41,609 INFO L225 Difference]: With dead ends: 25 [2020-07-21 23:23:41,609 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 23:23:41,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=67, Invalid=273, Unknown=2, NotChecked=0, Total=342 [2020-07-21 23:23:41,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 23:23:41,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 23:23:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 23:23:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 23:23:41,611 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-07-21 23:23:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:23:41,612 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 23:23:41,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 23:23:41,612 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 23:23:41,612 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 23:23:41,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:23:41,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 23:23:42,008 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2020-07-21 23:23:42,011 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 23:23:42,011 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:23:42,012 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:23:42,012 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 23:23:42,012 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:23:42,012 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:23:42,012 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:23:42,013 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 23:23:42,013 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:23:42,013 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:23:42,013 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 38) no Hoare annotation was computed. [2020-07-21 23:23:42,013 INFO L268 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-07-21 23:23:42,013 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 38) no Hoare annotation was computed. [2020-07-21 23:23:42,014 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-21 23:23:42,014 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 38) the Hoare annotation is: true [2020-07-21 23:23:42,014 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-21 23:23:42,014 INFO L268 CegarLoopResult]: For program point L28-2(lines 13 38) no Hoare annotation was computed. [2020-07-21 23:23:42,014 INFO L268 CegarLoopResult]: For program point L24(lines 24 33) no Hoare annotation was computed. [2020-07-21 23:23:42,015 INFO L268 CegarLoopResult]: For program point L24-2(lines 13 38) no Hoare annotation was computed. [2020-07-21 23:23:42,015 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (or (and (= 1 main_~b~0) (= 1 main_~a~0)) (and (= 0 main_~a~0) (= 0 main_~b~0)) (and (= (mod main_~b~0 4294967296) (mod main_~a~0 4294967296)) (= 0 (mod main_~i~0 2)) (= (mod (+ main_~a~0 1) 4294967296) (mod (+ main_~j~0 main_~b~0 (* main_~i~0 4294967295)) 4294967296)))) [2020-07-21 23:23:42,015 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 23:23:42,015 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 23:23:42,015 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 23:23:42,016 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 23:23:42,016 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 23:23:42,016 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 23:23:42,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:23:42 BoogieIcfgContainer [2020-07-21 23:23:42,023 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:23:42,025 INFO L168 Benchmark]: Toolchain (without parser) took 16038.50 ms. Allocated memory was 148.4 MB in the beginning and 230.7 MB in the end (delta: 82.3 MB). Free memory was 106.0 MB in the beginning and 105.8 MB in the end (delta: 242.6 kB). Peak memory consumption was 82.6 MB. Max. memory is 7.1 GB. [2020-07-21 23:23:42,026 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 148.4 MB. Free memory was 124.6 MB in the beginning and 124.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 23:23:42,027 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.78 ms. Allocated memory is still 148.4 MB. Free memory was 105.6 MB in the beginning and 95.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 23:23:42,028 INFO L168 Benchmark]: Boogie Preprocessor took 115.76 ms. Allocated memory was 148.4 MB in the beginning and 202.4 MB in the end (delta: 54.0 MB). Free memory was 95.9 MB in the beginning and 181.2 MB in the end (delta: -85.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:23:42,029 INFO L168 Benchmark]: RCFGBuilder took 291.29 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 167.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-21 23:23:42,030 INFO L168 Benchmark]: TraceAbstraction took 15373.20 ms. Allocated memory was 202.4 MB in the beginning and 230.7 MB in the end (delta: 28.3 MB). Free memory was 167.0 MB in the beginning and 105.8 MB in the end (delta: 61.2 MB). Peak memory consumption was 89.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:23:42,034 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 148.4 MB. Free memory was 124.6 MB in the beginning and 124.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.78 ms. Allocated memory is still 148.4 MB. Free memory was 105.6 MB in the beginning and 95.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.76 ms. Allocated memory was 148.4 MB in the beginning and 202.4 MB in the end (delta: 54.0 MB). Free memory was 95.9 MB in the beginning and 181.2 MB in the end (delta: -85.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 291.29 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 167.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15373.20 ms. Allocated memory was 202.4 MB in the beginning and 230.7 MB in the end (delta: 28.3 MB). Free memory was 167.0 MB in the beginning and 105.8 MB in the end (delta: 61.2 MB). Peak memory consumption was 89.5 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.0s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 12.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 110 SDtfs, 28 SDslu, 223 SDs, 0 SdLazy, 109 SolverSat, 8 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 6.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 6.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 13 PreInvPairs, 17 NumberOfFragments, 47 HoareAnnotationTreeSize, 13 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 26 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 108 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 152 ConstructedInterpolants, 0 QuantifiedInterpolants, 9739 SizeOfPredicates, 10 NumberOfNonLiveVariables, 309 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 10 InterpolantComputations, 5 PerfectInterpolantSequences, 13/34 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...