/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 NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:44:59,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:44:59,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:44:59,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:44:59,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:44:59,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:44:59,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:44:59,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:44:59,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:44:59,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:44:59,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:44:59,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:44:59,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:44:59,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:44:59,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:44:59,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:44:59,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:44:59,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:44:59,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:44:59,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:44:59,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:44:59,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:44:59,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:44:59,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:44:59,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:44:59,705 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 15:44:59,721 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:44:59,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:44:59,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:44:59,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:44:59,722 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:44:59,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:44:59,723 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:44:59,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:44:59,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:44:59,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:44:59,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:44:59,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:44:59,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:44:59,724 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:44:59,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:44:59,725 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:44:59,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:44:59,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:44:59,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:44:59,725 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:44:59,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:44:59,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:44:59,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:44:59,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:44:59,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:44:59,727 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:44:59,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:59,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:44:59,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:44:59,727 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 -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 15:45:00,024 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:45:00,041 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:45:00,045 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:45:00,047 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:45:00,047 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:45:00,049 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-07-21 15:45:00,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afb6fe8a3/262526b065ae4c0781f6af2e8bd508cc/FLAGd294da392 [2020-07-21 15:45:00,601 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:45:00,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-07-21 15:45:00,610 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afb6fe8a3/262526b065ae4c0781f6af2e8bd508cc/FLAGd294da392 [2020-07-21 15:45:00,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afb6fe8a3/262526b065ae4c0781f6af2e8bd508cc [2020-07-21 15:45:00,949 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:45:00,951 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:45:00,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:00,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:45:00,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:45:00,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:00" (1/1) ... [2020-07-21 15:45:00,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52590782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:00, skipping insertion in model container [2020-07-21 15:45:00,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:45:00" (1/1) ... [2020-07-21 15:45:00,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:45:00,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:45:01,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:01,172 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:45:01,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:45:01,210 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:45:01,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:01 WrapperNode [2020-07-21 15:45:01,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:45:01,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:45:01,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:45:01,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:45:01,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:01" (1/1) ... [2020-07-21 15:45:01,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:01" (1/1) ... [2020-07-21 15:45:01,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:01" (1/1) ... [2020-07-21 15:45:01,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:01" (1/1) ... [2020-07-21 15:45:01,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:01" (1/1) ... [2020-07-21 15:45:01,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:01" (1/1) ... [2020-07-21 15:45:01,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:01" (1/1) ... [2020-07-21 15:45:01,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:45:01,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:45:01,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:45:01,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:45:01,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:01" (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 15:45:01,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:45:01,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:45:01,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 15:45:01,399 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:45:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:45:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 15:45:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 15:45:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:45:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:45:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:45:01,668 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:45:01,668 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 15:45:01,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:01 BoogieIcfgContainer [2020-07-21 15:45:01,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:45:01,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:45:01,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:45:01,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:45:01,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:45:00" (1/3) ... [2020-07-21 15:45:01,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259cfb4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:01, skipping insertion in model container [2020-07-21 15:45:01,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:45:01" (2/3) ... [2020-07-21 15:45:01,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259cfb4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:45:01, skipping insertion in model container [2020-07-21 15:45:01,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:45:01" (3/3) ... [2020-07-21 15:45:01,681 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-07-21 15:45:01,691 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:45:01,700 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:45:01,714 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:45:01,737 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:45:01,737 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:45:01,737 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:45:01,737 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:45:01,738 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:45:01,738 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:45:01,738 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:45:01,738 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:45:01,756 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 15:45:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 15:45:01,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:01,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:01,762 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:01,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:01,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1906239810, now seen corresponding path program 1 times [2020-07-21 15:45:01,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:01,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498727528] [2020-07-21 15:45:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:45:01,858 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:01,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:01,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 15:45:01,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:01,897 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 15:45:01,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:01,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498727528] [2020-07-21 15:45:01,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:01,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 15:45:01,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841414446] [2020-07-21 15:45:01,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 15:45:01,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:01,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 15:45:01,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 15:45:01,942 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-07-21 15:45:01,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:01,975 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2020-07-21 15:45:01,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 15:45:01,976 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 15:45:01,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:01,983 INFO L225 Difference]: With dead ends: 38 [2020-07-21 15:45:01,984 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 15:45:01,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 15:45:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 15:45:02,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 15:45:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 15:45:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2020-07-21 15:45:02,027 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 10 [2020-07-21 15:45:02,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:02,028 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-07-21 15:45:02,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 15:45:02,028 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2020-07-21 15:45:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 15:45:02,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:02,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:02,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:02,231 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1847134466, now seen corresponding path program 1 times [2020-07-21 15:45:02,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:02,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362038679] [2020-07-21 15:45:02,235 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:45:02,276 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:02,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:02,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:45:02,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:02,308 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 15:45:02,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:02,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362038679] [2020-07-21 15:45:02,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:02,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 15:45:02,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117020628] [2020-07-21 15:45:02,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 15:45:02,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:02,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 15:45:02,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 15:45:02,312 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand 3 states. [2020-07-21 15:45:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:02,382 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2020-07-21 15:45:02,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 15:45:02,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-21 15:45:02,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:02,385 INFO L225 Difference]: With dead ends: 28 [2020-07-21 15:45:02,386 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 15:45:02,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 15:45:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 15:45:02,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-07-21 15:45:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 15:45:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2020-07-21 15:45:02,394 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 10 [2020-07-21 15:45:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:02,395 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2020-07-21 15:45:02,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 15:45:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2020-07-21 15:45:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 15:45:02,396 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:02,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:02,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:02,605 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:02,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:02,606 INFO L82 PathProgramCache]: Analyzing trace with hash -129940435, now seen corresponding path program 1 times [2020-07-21 15:45:02,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:02,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570248517] [2020-07-21 15:45:02,611 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:45:02,669 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:02,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:02,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 15:45:02,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:02,719 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 15:45:02,722 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-21 15:45:02,730 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 15:45:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:45:02,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:02,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570248517] [2020-07-21 15:45:02,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:02,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 15:45:02,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138543802] [2020-07-21 15:45:02,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 15:45:02,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:02,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 15:45:02,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 15:45:02,756 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand 3 states. [2020-07-21 15:45:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:02,859 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2020-07-21 15:45:02,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 15:45:02,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 15:45:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:02,861 INFO L225 Difference]: With dead ends: 50 [2020-07-21 15:45:02,862 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 15:45:02,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 15:45:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 15:45:02,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-21 15:45:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 15:45:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2020-07-21 15:45:02,870 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 21 [2020-07-21 15:45:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:02,871 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2020-07-21 15:45:02,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 15:45:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2020-07-21 15:45:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 15:45:02,872 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:02,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:03,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:03,086 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:03,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:03,087 INFO L82 PathProgramCache]: Analyzing trace with hash 263086575, now seen corresponding path program 1 times [2020-07-21 15:45:03,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:03,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536970976] [2020-07-21 15:45:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:45:03,136 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:03,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:03,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 15:45:03,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:45:03,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:45:06,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536970976] [2020-07-21 15:45:06,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:06,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-21 15:45:06,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831550860] [2020-07-21 15:45:06,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 15:45:06,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:06,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 15:45:06,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=385, Unknown=1, NotChecked=0, Total=552 [2020-07-21 15:45:06,603 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 24 states. [2020-07-21 15:45:07,214 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 15:45:07,917 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 15:45:08,291 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 13 [2020-07-21 15:45:09,800 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-21 15:45:12,323 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2020-07-21 15:45:17,870 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-21 15:45:23,059 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2020-07-21 15:45:29,991 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 18 DAG size of output: 13 [2020-07-21 15:45:44,212 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2020-07-21 15:46:10,342 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-21 15:46:23,308 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 33 DAG size of output: 13 [2020-07-21 15:46:41,363 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-21 15:46:46,392 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 15:46:52,405 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 13 [2020-07-21 15:46:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:56,581 INFO L93 Difference]: Finished difference Result 145 states and 178 transitions. [2020-07-21 15:46:56,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 15:46:56,653 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2020-07-21 15:46:56,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:56,655 INFO L225 Difference]: With dead ends: 145 [2020-07-21 15:46:56,655 INFO L226 Difference]: Without dead ends: 140 [2020-07-21 15:46:56,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 54.4s TimeCoverageRelationStatistics Valid=715, Invalid=1351, Unknown=4, NotChecked=0, Total=2070 [2020-07-21 15:46:56,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-21 15:46:56,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 67. [2020-07-21 15:46:56,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 15:46:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2020-07-21 15:46:56,676 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 21 [2020-07-21 15:46:56,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:56,676 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2020-07-21 15:46:56,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 15:46:56,677 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2020-07-21 15:46:56,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 15:46:56,678 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:56,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:56,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:56,880 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:56,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash -402778255, now seen corresponding path program 1 times [2020-07-21 15:46:56,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:56,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210156670] [2020-07-21 15:46:56,882 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:46:56,916 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:46:56,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:56,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 15:46:56,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:56,939 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 15:46:56,941 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 15:46:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:46:56,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:46:56,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210156670] [2020-07-21 15:46:56,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:46:56,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 15:46:56,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233145250] [2020-07-21 15:46:56,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 15:46:56,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:56,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 15:46:56,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 15:46:56,956 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand 3 states. [2020-07-21 15:46:57,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:57,023 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2020-07-21 15:46:57,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 15:46:57,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 15:46:57,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:57,025 INFO L225 Difference]: With dead ends: 94 [2020-07-21 15:46:57,025 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 15:46:57,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 15:46:57,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 15:46:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-07-21 15:46:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 15:46:57,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-07-21 15:46:57,033 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 21 [2020-07-21 15:46:57,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:57,033 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-07-21 15:46:57,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 15:46:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-07-21 15:46:57,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 15:46:57,035 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:57,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:57,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:57,238 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:57,239 INFO L82 PathProgramCache]: Analyzing trace with hash -345519953, now seen corresponding path program 1 times [2020-07-21 15:46:57,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:57,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349075348] [2020-07-21 15:46:57,240 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:46:57,267 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:57,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 15:46:57,268 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 15:46:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 15:46:57,280 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 15:46:57,308 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 15:46:57,308 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 15:46:57,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:57,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:46:57 BoogieIcfgContainer [2020-07-21 15:46:57,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:46:57,547 INFO L168 Benchmark]: Toolchain (without parser) took 116597.11 ms. Allocated memory was 144.7 MB in the beginning and 246.9 MB in the end (delta: 102.2 MB). Free memory was 102.0 MB in the beginning and 118.3 MB in the end (delta: -16.3 MB). Peak memory consumption was 86.0 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:57,548 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 15:46:57,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.44 ms. Allocated memory is still 144.7 MB. Free memory was 101.8 MB in the beginning and 91.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:57,550 INFO L168 Benchmark]: Boogie Preprocessor took 122.82 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.2 MB in the beginning and 181.7 MB in the end (delta: -90.6 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:57,551 INFO L168 Benchmark]: RCFGBuilder took 338.01 ms. Allocated memory is still 201.9 MB. Free memory was 181.7 MB in the beginning and 164.6 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:57,552 INFO L168 Benchmark]: TraceAbstraction took 115871.94 ms. Allocated memory was 201.9 MB in the beginning and 246.9 MB in the end (delta: 45.1 MB). Free memory was 164.6 MB in the beginning and 118.3 MB in the end (delta: 46.3 MB). Peak memory consumption was 91.4 MB. Max. memory is 7.1 GB. [2020-07-21 15:46:57,556 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 258.44 ms. Allocated memory is still 144.7 MB. Free memory was 101.8 MB in the beginning and 91.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.82 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.2 MB in the beginning and 181.7 MB in the end (delta: -90.6 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 338.01 ms. Allocated memory is still 201.9 MB. Free memory was 181.7 MB in the beginning and 164.6 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 115871.94 ms. Allocated memory was 201.9 MB in the beginning and 246.9 MB in the end (delta: 45.1 MB). Free memory was 164.6 MB in the beginning and 118.3 MB in the end (delta: 46.3 MB). Peak memory consumption was 91.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 VAL [x=0, y=4294967295] [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 VAL [x=2, y=4294967295] [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 VAL [x=0, y=4294967295] [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 VAL [x=2, y=4294967295] [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 VAL [x=0, y=4294967295] [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 VAL [x=2, y=4294967295] [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 VAL [x=4294967294, y=4294967295] [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 VAL [x=2, y=4294967295] [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 VAL [x=4, y=4294967295] [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 VAL [x=0, y=4294967295] [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 VAL [x=4294967292, y=4294967295] [L15] COND FALSE !(x < 99) VAL [x=4294967292, y=4294967295] [L47] CALL __VERIFIER_assert((x % 2) == (y % 2)) VAL [\old(cond)=0] [L5] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L6] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 115.7s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 110.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 59 SDslu, 124 SDs, 0 SdLazy, 835 SolverSat, 482 SolverUnsat, 27 SolverUnknown, 0 SolverNotchecked, 56.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 54.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred 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, 88 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 104 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 4960 SizeOfPredicates, 4 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 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 incorrect! Received shutdown request...