/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:03:47,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:03:47,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:03:47,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:03:47,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:03:47,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:03:47,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:03:47,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:03:47,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:03:47,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:03:47,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:03:47,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:03:47,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:03:48,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:03:48,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:03:48,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:03:48,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:03:48,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:03:48,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:03:48,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:03:48,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:03:48,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:03:48,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:03:48,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:03:48,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:03:48,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:03:48,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:03:48,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:03:48,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 06:03:48,049 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:03:48,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:03:48,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:03:48,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:03:48,051 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:03:48,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:03:48,052 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:03:48,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:03:48,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:03:48,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:03:48,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:03:48,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:03:48,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:03:48,053 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:03:48,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:03:48,054 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:03:48,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:03:48,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:03:48,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:03:48,054 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:03:48,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:03:48,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:03:48,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:03:48,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:03:48,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:03:48,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:03:48,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:03:48,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:03:48,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:03:48,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 06:03:48,420 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:03:48,435 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:03:48,439 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:03:48,440 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:03:48,440 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:03:48,441 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-20 06:03:48,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a12c6685/843cf493fa994206bea8b82506fbf5c3/FLAG4d756afc7 [2020-07-20 06:03:48,993 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:03:48,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-20 06:03:49,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a12c6685/843cf493fa994206bea8b82506fbf5c3/FLAG4d756afc7 [2020-07-20 06:03:49,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a12c6685/843cf493fa994206bea8b82506fbf5c3 [2020-07-20 06:03:49,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:03:49,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:03:49,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:03:49,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:03:49,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:03:49,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:03:49" (1/1) ... [2020-07-20 06:03:49,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6377931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:49, skipping insertion in model container [2020-07-20 06:03:49,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:03:49" (1/1) ... [2020-07-20 06:03:49,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:03:49,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:03:49,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:03:49,610 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:03:49,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:03:49,657 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:03:49,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:49 WrapperNode [2020-07-20 06:03:49,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:03:49,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:03:49,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:03:49,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:03:49,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:49" (1/1) ... [2020-07-20 06:03:49,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:49" (1/1) ... [2020-07-20 06:03:49,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:49" (1/1) ... [2020-07-20 06:03:49,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:49" (1/1) ... [2020-07-20 06:03:49,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:49" (1/1) ... [2020-07-20 06:03:49,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:49" (1/1) ... [2020-07-20 06:03:49,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:49" (1/1) ... [2020-07-20 06:03:49,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:03:49,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:03:49,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:03:49,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:03:49,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:03:49,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:03:49,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:03:49,966 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-20 06:03:49,967 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-20 06:03:49,967 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:03:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:03:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 06:03:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-20 06:03:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 06:03:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-20 06:03:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 06:03:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:03:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 06:03:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 06:03:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:03:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:03:50,287 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:03:50,287 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 06:03:50,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:03:50 BoogieIcfgContainer [2020-07-20 06:03:50,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:03:50,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:03:50,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:03:50,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:03:50,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:03:49" (1/3) ... [2020-07-20 06:03:50,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7444a7b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:03:50, skipping insertion in model container [2020-07-20 06:03:50,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:03:49" (2/3) ... [2020-07-20 06:03:50,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7444a7b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:03:50, skipping insertion in model container [2020-07-20 06:03:50,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:03:50" (3/3) ... [2020-07-20 06:03:50,307 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-07-20 06:03:50,321 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:03:50,329 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:03:50,357 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:03:50,387 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:03:50,388 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:03:50,388 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:03:50,388 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:03:50,388 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:03:50,388 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:03:50,389 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:03:50,389 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:03:50,410 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-07-20 06:03:50,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 06:03:50,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:50,419 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:03:50,420 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:50,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2020-07-20 06:03:50,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:50,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570510933] [2020-07-20 06:03:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b9b2cc3 [2020-07-20 06:03:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:50,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570510933] [2020-07-20 06:03:50,685 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-07-20 06:03:50,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242314295] [2020-07-20 06:03:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@625238b7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:50,784 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@625238b7 issued 1 check-sat command(s) [2020-07-20 06:03:50,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:03:50,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 06:03:50,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:03:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 06:03:50,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:03:50,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 06:03:50,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765296406] [2020-07-20 06:03:50,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:03:50,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:50,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:03:50,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:03:50,857 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-07-20 06:03:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:50,960 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-07-20 06:03:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:03:50,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-07-20 06:03:50,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:50,974 INFO L225 Difference]: With dead ends: 73 [2020-07-20 06:03:50,975 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 06:03:50,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:03:50,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 06:03:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-20 06:03:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 06:03:51,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-07-20 06:03:51,031 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2020-07-20 06:03:51,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:51,032 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-07-20 06:03:51,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:03:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-07-20 06:03:51,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 06:03:51,035 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:51,035 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:03:51,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-20 06:03:51,238 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:51,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:51,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times [2020-07-20 06:03:51,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:51,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812574050] [2020-07-20 06:03:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b9b2cc3 [2020-07-20 06:03:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 06:03:51,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812574050] [2020-07-20 06:03:51,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:03:51,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 06:03:51,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377040453] [2020-07-20 06:03:51,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 06:03:51,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:51,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 06:03:51,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:03:51,419 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 7 states. [2020-07-20 06:03:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:51,862 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-07-20 06:03:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 06:03:51,862 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-20 06:03:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:51,864 INFO L225 Difference]: With dead ends: 65 [2020-07-20 06:03:51,864 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 06:03:51,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-07-20 06:03:51,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 06:03:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-20 06:03:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 06:03:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-20 06:03:51,877 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2020-07-20 06:03:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:51,877 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-20 06:03:51,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 06:03:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-20 06:03:51,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 06:03:51,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:51,880 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:03:51,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 06:03:51,880 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:51,881 INFO L82 PathProgramCache]: Analyzing trace with hash 558201179, now seen corresponding path program 1 times [2020-07-20 06:03:51,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:51,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644260846] [2020-07-20 06:03:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b9b2cc3 [2020-07-20 06:03:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 06:03:52,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644260846] [2020-07-20 06:03:52,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557089195] [2020-07-20 06:03:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e2a7345 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:52,098 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e2a7345 issued 2 check-sat command(s) [2020-07-20 06:03:52,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:03:52,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 06:03:52,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:03:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 06:03:52,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:03:52,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2020-07-20 06:03:52,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921859721] [2020-07-20 06:03:52,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:03:52,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:52,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:03:52,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:03:52,147 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2020-07-20 06:03:52,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:52,207 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-07-20 06:03:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:03:52,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-07-20 06:03:52,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:52,209 INFO L225 Difference]: With dead ends: 57 [2020-07-20 06:03:52,209 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 06:03:52,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:03:52,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 06:03:52,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-20 06:03:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 06:03:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-07-20 06:03:52,219 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 40 [2020-07-20 06:03:52,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:52,220 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-07-20 06:03:52,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:03:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-07-20 06:03:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 06:03:52,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:52,222 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:03:52,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:52,437 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:52,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:52,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1437163047, now seen corresponding path program 1 times [2020-07-20 06:03:52,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:52,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566595634] [2020-07-20 06:03:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b9b2cc3 [2020-07-20 06:03:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 06:03:52,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566595634] [2020-07-20 06:03:52,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889318089] [2020-07-20 06:03:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2e122dbf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:52,634 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2e122dbf issued 3 check-sat command(s) [2020-07-20 06:03:52,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:03:52,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 06:03:52,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:03:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 06:03:52,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:03:52,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2020-07-20 06:03:52,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83991286] [2020-07-20 06:03:52,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 06:03:52,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:52,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 06:03:52,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:03:52,686 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 10 states. [2020-07-20 06:03:53,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:53,089 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-07-20 06:03:53,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 06:03:53,090 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-07-20 06:03:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:53,092 INFO L225 Difference]: With dead ends: 69 [2020-07-20 06:03:53,092 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 06:03:53,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2020-07-20 06:03:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 06:03:53,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-20 06:03:53,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 06:03:53,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-20 06:03:53,108 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2020-07-20 06:03:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:53,108 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-20 06:03:53,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 06:03:53,109 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-20 06:03:53,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 06:03:53,112 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:53,113 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:03:53,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:53,314 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:53,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:53,314 INFO L82 PathProgramCache]: Analyzing trace with hash 545653175, now seen corresponding path program 2 times [2020-07-20 06:03:53,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:53,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813625436] [2020-07-20 06:03:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b9b2cc3 [2020-07-20 06:03:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 06:03:53,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813625436] [2020-07-20 06:03:53,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345430906] [2020-07-20 06:03:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37ca43a0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:53,499 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37ca43a0 issued 3 check-sat command(s) [2020-07-20 06:03:53,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:03:53,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 06:03:53,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:03:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 06:03:53,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:03:53,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2020-07-20 06:03:53,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764633073] [2020-07-20 06:03:53,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:03:53,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:53,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:03:53,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:03:53,536 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 4 states. [2020-07-20 06:03:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:53,628 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2020-07-20 06:03:53,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:03:53,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-07-20 06:03:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:53,632 INFO L225 Difference]: With dead ends: 67 [2020-07-20 06:03:53,632 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 06:03:53,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:03:53,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 06:03:53,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-20 06:03:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 06:03:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-07-20 06:03:53,648 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 44 [2020-07-20 06:03:53,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:53,649 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-07-20 06:03:53,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:03:53,650 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-07-20 06:03:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 06:03:53,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:53,654 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:03:53,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:53,871 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:53,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:53,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2870664, now seen corresponding path program 1 times [2020-07-20 06:03:53,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:53,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454777922] [2020-07-20 06:03:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b9b2cc3 [2020-07-20 06:03:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-20 06:03:54,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454777922] [2020-07-20 06:03:54,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029717028] [2020-07-20 06:03:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fb97e84 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:54,102 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fb97e84 issued 3 check-sat command(s) [2020-07-20 06:03:54,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:03:54,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 06:03:54,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:03:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-20 06:03:54,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:03:54,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2020-07-20 06:03:54,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437243494] [2020-07-20 06:03:54,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 06:03:54,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:54,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 06:03:54,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:03:54,149 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 10 states. [2020-07-20 06:03:54,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:54,450 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2020-07-20 06:03:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 06:03:54,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-07-20 06:03:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:54,452 INFO L225 Difference]: With dead ends: 72 [2020-07-20 06:03:54,452 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 06:03:54,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-07-20 06:03:54,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 06:03:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-20 06:03:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 06:03:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-20 06:03:54,461 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 53 [2020-07-20 06:03:54,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:54,462 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-20 06:03:54,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 06:03:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-20 06:03:54,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 06:03:54,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:54,464 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:03:54,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 06:03:54,678 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:54,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:54,679 INFO L82 PathProgramCache]: Analyzing trace with hash -619650601, now seen corresponding path program 2 times [2020-07-20 06:03:54,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:54,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434186761] [2020-07-20 06:03:54,680 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b9b2cc3 [2020-07-20 06:03:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-20 06:03:54,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434186761] [2020-07-20 06:03:54,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:03:54,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-20 06:03:54,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330346063] [2020-07-20 06:03:54,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 06:03:54,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:54,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 06:03:54,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-20 06:03:54,899 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 11 states. [2020-07-20 06:03:55,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:55,194 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-07-20 06:03:55,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 06:03:55,199 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-07-20 06:03:55,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:55,201 INFO L225 Difference]: With dead ends: 74 [2020-07-20 06:03:55,202 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 06:03:55,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-07-20 06:03:55,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 06:03:55,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-07-20 06:03:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 06:03:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-07-20 06:03:55,214 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 62 [2020-07-20 06:03:55,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:55,214 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-07-20 06:03:55,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 06:03:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-07-20 06:03:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 06:03:55,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:55,216 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:03:55,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 06:03:55,217 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:55,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2020-07-20 06:03:55,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:55,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940468885] [2020-07-20 06:03:55,218 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b9b2cc3 [2020-07-20 06:03:55,239 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:03:55,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620811844] [2020-07-20 06:03:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74ab3b48 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:55,350 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74ab3b48 issued 4 check-sat command(s) [2020-07-20 06:03:55,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:03:55,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 06:03:55,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:03:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-20 06:03:55,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940468885] [2020-07-20 06:03:55,422 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:03:55,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620811844] [2020-07-20 06:03:55,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:03:55,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 06:03:55,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866593090] [2020-07-20 06:03:55,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 06:03:55,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:55,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 06:03:55,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:03:55,430 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 9 states. [2020-07-20 06:03:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:55,582 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2020-07-20 06:03:55,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 06:03:55,583 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-07-20 06:03:55,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:55,585 INFO L225 Difference]: With dead ends: 120 [2020-07-20 06:03:55,585 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 06:03:55,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:03:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 06:03:55,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-07-20 06:03:55,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 06:03:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-07-20 06:03:55,596 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 65 [2020-07-20 06:03:55,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:55,597 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-07-20 06:03:55,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 06:03:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-07-20 06:03:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 06:03:55,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:55,598 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:03:55,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:55,812 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:55,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2040052581, now seen corresponding path program 2 times [2020-07-20 06:03:55,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:55,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823251817] [2020-07-20 06:03:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b9b2cc3 [2020-07-20 06:03:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:03:55,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823251817] [2020-07-20 06:03:55,999 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-07-20 06:03:56,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763965797] [2020-07-20 06:03:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@78360582 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:56,148 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@78360582 issued 3 check-sat command(s) [2020-07-20 06:03:56,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:03:56,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 06:03:56,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:03:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-20 06:03:56,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:03:56,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 06:03:56,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645579770] [2020-07-20 06:03:56,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 06:03:56,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:56,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 06:03:56,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-07-20 06:03:56,242 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 9 states. [2020-07-20 06:03:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:56,356 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-07-20 06:03:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 06:03:56,357 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-07-20 06:03:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:56,358 INFO L225 Difference]: With dead ends: 99 [2020-07-20 06:03:56,358 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 06:03:56,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-07-20 06:03:56,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 06:03:56,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-07-20 06:03:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 06:03:56,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-07-20 06:03:56,370 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 67 [2020-07-20 06:03:56,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:56,371 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-07-20 06:03:56,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 06:03:56,371 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-07-20 06:03:56,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 06:03:56,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:56,372 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:03:56,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:56,576 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:56,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:56,577 INFO L82 PathProgramCache]: Analyzing trace with hash -737365673, now seen corresponding path program 1 times [2020-07-20 06:03:56,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:56,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313060557] [2020-07-20 06:03:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b9b2cc3 [2020-07-20 06:03:56,594 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:03:56,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474195813] [2020-07-20 06:03:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5867bb6d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:56,779 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5867bb6d issued 3 check-sat command(s) [2020-07-20 06:03:56,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:03:56,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 06:03:56,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:03:56,844 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-20 06:03:56,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313060557] [2020-07-20 06:03:56,845 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:03:56,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474195813] [2020-07-20 06:03:56,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:03:56,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 06:03:56,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896660457] [2020-07-20 06:03:56,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 06:03:56,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:03:56,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 06:03:56,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:03:56,847 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 8 states. [2020-07-20 06:03:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:03:56,932 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2020-07-20 06:03:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 06:03:56,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-07-20 06:03:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:03:56,934 INFO L225 Difference]: With dead ends: 94 [2020-07-20 06:03:56,934 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 06:03:56,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:03:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 06:03:56,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-07-20 06:03:56,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 06:03:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-07-20 06:03:56,945 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 73 [2020-07-20 06:03:56,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:03:56,945 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-07-20 06:03:56,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 06:03:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-07-20 06:03:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-20 06:03:56,947 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:03:56,947 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:03:57,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 06:03:57,163 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:03:57,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:03:57,164 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 2 times [2020-07-20 06:03:57,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:03:57,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801268529] [2020-07-20 06:03:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b9b2cc3 [2020-07-20 06:03:57,177 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:03:57,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336556915] [2020-07-20 06:03:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70f2e6b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:57,423 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70f2e6b issued 4 check-sat command(s) [2020-07-20 06:03:57,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 06:03:57,424 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 06:03:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 06:03:57,491 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 06:03:57,545 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 06:03:57,546 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 06:03:57,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:03:57,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:03:57 BoogieIcfgContainer [2020-07-20 06:03:57,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 06:03:57,852 INFO L168 Benchmark]: Toolchain (without parser) took 8497.11 ms. Allocated memory was 137.9 MB in the beginning and 280.5 MB in the end (delta: 142.6 MB). Free memory was 102.8 MB in the beginning and 251.7 MB in the end (delta: -148.9 MB). Peak memory consumption was 151.7 MB. Max. memory is 7.1 GB. [2020-07-20 06:03:57,853 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 06:03:57,854 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.55 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 91.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-20 06:03:57,860 INFO L168 Benchmark]: Boogie Preprocessor took 231.31 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 91.5 MB in the beginning and 180.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-20 06:03:57,861 INFO L168 Benchmark]: RCFGBuilder took 403.35 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 161.5 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-07-20 06:03:57,862 INFO L168 Benchmark]: TraceAbstraction took 7552.99 ms. Allocated memory was 202.4 MB in the beginning and 280.5 MB in the end (delta: 78.1 MB). Free memory was 160.9 MB in the beginning and 251.7 MB in the end (delta: -90.8 MB). Peak memory consumption was 145.3 MB. Max. memory is 7.1 GB. [2020-07-20 06:03:57,871 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.55 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 91.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 231.31 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 91.5 MB in the beginning and 180.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 403.35 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 161.5 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7552.99 ms. Allocated memory was 202.4 MB in the beginning and 280.5 MB in the end (delta: 78.1 MB). Free memory was 160.9 MB in the beginning and 251.7 MB in the end (delta: -90.8 MB). Peak memory consumption was 145.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [\old(N)=5, N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; VAL [\old(N)=0, N=3, x={2:0}] [L35] CALL init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L6] int i; [L7] i = 0 VAL [\old(N)=0, i=0, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=1, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=2, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L7] COND FALSE !(i < N) VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L35] RET init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; VAL [\old(N)=0, N=3, x={2:0}] [L41] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=0, x={2:0}] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp VAL [\old(N)=0, N=3, ret=0, temp=1, x={2:0}] [L44] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L44] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=0, ret=0, temp=1, x={2:0}] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [\old(N)=0, i=0, N=3, ret=0, ret2=0, temp=-1, x={2:0}] [L46] COND TRUE i N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-1, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-1, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-1, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-1, cnt=1, i=3, N=3, ret=-1, x={2:0}, x={2:0}] [L50] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=-1, ret=0, ret2=0, temp=-1, x={2:0}] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=0, ret2=0, ret5=-1, temp=-1, x={2:0}] [L53] __VERIFIER_error() VAL [\old(N)=0, i=2, N=3, ret=0, ret2=0, ret5=-1, temp=-1, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.3s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 296 SDtfs, 348 SDslu, 587 SDs, 0 SdLazy, 947 SolverSat, 101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 569 GetRequests, 456 SyntacticMatches, 11 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 27 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 881 NumberOfCodeBlocks, 770 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 687 ConstructedInterpolants, 0 QuantifiedInterpolants, 73987 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1286 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 617/668 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...