/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:14:40,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:14:40,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:14:40,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:14:40,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:14:40,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:14:40,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:14:40,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:14:40,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:14:40,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:14:40,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:14:40,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:14:40,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:14:40,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:14:40,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:14:40,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:14:40,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:14:40,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:14:40,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:14:40,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:14:40,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:14:40,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:14:40,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:14:40,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:14:40,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:14:40,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 12:14:40,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 12:14:40,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 12:14:40,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 12:14:40,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 12:14:40,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 12:14:40,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 12:14:40,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 12:14:40,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:14:40,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:14:40,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:14:40,497 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 [2020-07-17 12:14:40,513 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:14:40,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:14:40,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:14:40,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:14:40,515 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:14:40,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:14:40,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:14:40,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:14:40,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:14:40,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:14:40,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:14:40,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:14:40,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:14:40,517 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:14:40,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:14:40,517 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:14:40,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:14:40,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:14:40,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:14:40,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:14:40,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:14:40,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:14:40,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:14:40,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:14:40,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:14:40,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:14:40,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:14:40,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:14:40,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:14:40,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:14:40,836 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:14:40,849 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:14:40,853 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:14:40,854 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:14:40,854 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:14:40,855 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-17 12:14:40,938 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/473bef648/a75b31dbccf34faab1ecb34a6d1e5b40/FLAGb25bd0e24 [2020-07-17 12:14:41,467 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:14:41,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-17 12:14:41,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/473bef648/a75b31dbccf34faab1ecb34a6d1e5b40/FLAGb25bd0e24 [2020-07-17 12:14:41,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/473bef648/a75b31dbccf34faab1ecb34a6d1e5b40 [2020-07-17 12:14:41,795 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:14:41,798 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:14:41,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:14:41,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:14:41,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:14:41,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:14:41" (1/1) ... [2020-07-17 12:14:41,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c094cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:41, skipping insertion in model container [2020-07-17 12:14:41,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:14:41" (1/1) ... [2020-07-17 12:14:41,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:14:41,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:14:42,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:14:42,035 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:14:42,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:14:42,080 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:14:42,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:42 WrapperNode [2020-07-17 12:14:42,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:14:42,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:14:42,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:14:42,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:14:42,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:42" (1/1) ... [2020-07-17 12:14:42,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:42" (1/1) ... [2020-07-17 12:14:42,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:42" (1/1) ... [2020-07-17 12:14:42,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:42" (1/1) ... [2020-07-17 12:14:42,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:42" (1/1) ... [2020-07-17 12:14:42,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:42" (1/1) ... [2020-07-17 12:14:42,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:42" (1/1) ... [2020-07-17 12:14:42,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:14:42,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:14:42,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:14:42,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:14:42,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:42" (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 [2020-07-17 12:14:42,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:14:42,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:14:42,309 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:14:42,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:14:42,309 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:14:42,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:14:42,309 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:14:42,309 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:14:42,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:14:42,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:14:42,310 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 12:14:42,310 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:14:42,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 12:14:42,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 12:14:42,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 12:14:42,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:14:42,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:14:42,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 12:14:42,634 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:14:42,635 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 12:14:42,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:14:42 BoogieIcfgContainer [2020-07-17 12:14:42,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:14:42,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:14:42,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:14:42,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:14:42,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:14:41" (1/3) ... [2020-07-17 12:14:42,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700fcabc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:14:42, skipping insertion in model container [2020-07-17 12:14:42,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:42" (2/3) ... [2020-07-17 12:14:42,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700fcabc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:14:42, skipping insertion in model container [2020-07-17 12:14:42,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:14:42" (3/3) ... [2020-07-17 12:14:42,648 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-07-17 12:14:42,661 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:14:42,669 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:14:42,684 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:14:42,731 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:14:42,731 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:14:42,731 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:14:42,731 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:14:42,732 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:14:42,732 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:14:42,732 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:14:42,732 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:14:42,754 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-17 12:14:42,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:14:42,759 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:42,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:14:42,760 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:42,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:42,766 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-17 12:14:42,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:42,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128804094] [2020-07-17 12:14:42,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:14:43,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128804094] [2020-07-17 12:14:43,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:14:43,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:14:43,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90965455] [2020-07-17 12:14:43,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:14:43,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:43,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:14:43,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:14:43,039 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-07-17 12:14:43,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:14:43,166 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-17 12:14:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:14:43,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-17 12:14:43,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:14:43,178 INFO L225 Difference]: With dead ends: 62 [2020-07-17 12:14:43,178 INFO L226 Difference]: Without dead ends: 31 [2020-07-17 12:14:43,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:14:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-17 12:14:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-17 12:14:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-17 12:14:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-17 12:14:43,236 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-17 12:14:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:14:43,237 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-17 12:14:43,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:14:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-17 12:14:43,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:14:43,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:43,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:14:43,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:14:43,239 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:43,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:43,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-17 12:14:43,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:43,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807911726] [2020-07-17 12:14:43,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:43,270 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:14:43,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97418736] [2020-07-17 12:14:43,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:14:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:43,353 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-17 12:14:43,362 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:14:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:14:43,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807911726] [2020-07-17 12:14:43,414 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:14:43,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97418736] [2020-07-17 12:14:43,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:14:43,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:14:43,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475022603] [2020-07-17 12:14:43,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:14:43,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:43,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:14:43,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:14:43,418 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-17 12:14:43,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:14:43,526 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-17 12:14:43,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:14:43,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-17 12:14:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:14:43,530 INFO L225 Difference]: With dead ends: 56 [2020-07-17 12:14:43,530 INFO L226 Difference]: Without dead ends: 41 [2020-07-17 12:14:43,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:14:43,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-17 12:14:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-17 12:14:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 12:14:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-17 12:14:43,547 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-17 12:14:43,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:14:43,547 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-17 12:14:43,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:14:43,548 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-17 12:14:43,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:14:43,549 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:43,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:14:43,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-17 12:14:43,764 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:43,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:43,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-17 12:14:43,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:43,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844561395] [2020-07-17 12:14:43,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:43,809 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:14:43,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574287036] [2020-07-17 12:14:43,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -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 [2020-07-17 12:14:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:43,878 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 12:14:43,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:14:43,956 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-17 12:14:43,957 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:43,961 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:14:43,962 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:14:43,962 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-17 12:14:44,025 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:14:44,026 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-17 12:14:44,027 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-17 12:14:44,049 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-17 12:14:44,050 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:14:44,050 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-17 12:14:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 12:14:44,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844561395] [2020-07-17 12:14:44,105 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:14:44,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574287036] [2020-07-17 12:14:44,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:14:44,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 12:14:44,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160285487] [2020-07-17 12:14:44,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 12:14:44,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:44,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 12:14:44,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:14:44,114 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-17 12:14:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:14:44,299 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-17 12:14:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:14:44,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-17 12:14:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:14:44,302 INFO L225 Difference]: With dead ends: 52 [2020-07-17 12:14:44,302 INFO L226 Difference]: Without dead ends: 50 [2020-07-17 12:14:44,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:14:44,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-17 12:14:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-07-17 12:14:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-17 12:14:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-17 12:14:44,313 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-07-17 12:14:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:14:44,314 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-17 12:14:44,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 12:14:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-17 12:14:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:14:44,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:44,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:14:44,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:14:44,529 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:44,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:44,529 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-17 12:14:44,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:44,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784436765] [2020-07-17 12:14:44,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 12:14:44,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784436765] [2020-07-17 12:14:44,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:14:44,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:14:44,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362674739] [2020-07-17 12:14:44,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:14:44,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:44,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:14:44,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:14:44,657 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 4 states. [2020-07-17 12:14:44,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:14:44,791 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-07-17 12:14:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:14:44,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-07-17 12:14:44,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:14:44,795 INFO L225 Difference]: With dead ends: 74 [2020-07-17 12:14:44,795 INFO L226 Difference]: Without dead ends: 45 [2020-07-17 12:14:44,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:14:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-17 12:14:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-07-17 12:14:44,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-17 12:14:44,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-17 12:14:44,814 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-07-17 12:14:44,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:14:44,820 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-17 12:14:44,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:14:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-17 12:14:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-17 12:14:44,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:44,821 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-17 12:14:44,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 12:14:44,822 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:44,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:44,822 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-17 12:14:44,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:44,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212573232] [2020-07-17 12:14:44,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:44,870 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:14:44,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236723296] [2020-07-17 12:14:44,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -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 [2020-07-17 12:14:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:44,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:14:44,943 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:14:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 12:14:45,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212573232] [2020-07-17 12:14:45,001 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:14:45,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236723296] [2020-07-17 12:14:45,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:14:45,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 12:14:45,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667302902] [2020-07-17 12:14:45,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 12:14:45,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:45,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 12:14:45,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:14:45,006 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 7 states. [2020-07-17 12:14:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:14:45,141 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-07-17 12:14:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:14:45,142 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-07-17 12:14:45,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:14:45,143 INFO L225 Difference]: With dead ends: 91 [2020-07-17 12:14:45,143 INFO L226 Difference]: Without dead ends: 55 [2020-07-17 12:14:45,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:14:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-17 12:14:45,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-17 12:14:45,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 12:14:45,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-17 12:14:45,153 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-17 12:14:45,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:14:45,153 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-17 12:14:45,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 12:14:45,154 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-17 12:14:45,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-17 12:14:45,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:45,155 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2020-07-17 12:14:45,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:14:45,369 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:45,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:45,369 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-17 12:14:45,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:45,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678030284] [2020-07-17 12:14:45,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:45,390 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:14:45,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838723199] [2020-07-17 12:14:45,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -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 [2020-07-17 12:14:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:14:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:14:45,544 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 12:14:45,546 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 12:14:45,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:14:45,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:14:45 BoogieIcfgContainer [2020-07-17 12:14:45,812 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:14:45,814 INFO L168 Benchmark]: Toolchain (without parser) took 4016.92 ms. Allocated memory was 134.7 MB in the beginning and 226.0 MB in the end (delta: 91.2 MB). Free memory was 99.9 MB in the beginning and 105.2 MB in the end (delta: -5.3 MB). Peak memory consumption was 86.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:14:45,815 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 134.7 MB. Free memory is still 117.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 12:14:45,816 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.56 ms. Allocated memory is still 134.7 MB. Free memory was 99.5 MB in the beginning and 89.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:14:45,817 INFO L168 Benchmark]: Boogie Preprocessor took 149.80 ms. Allocated memory was 134.7 MB in the beginning and 199.8 MB in the end (delta: 65.0 MB). Free memory was 89.1 MB in the beginning and 177.1 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-17 12:14:45,817 INFO L168 Benchmark]: RCFGBuilder took 406.26 ms. Allocated memory is still 199.8 MB. Free memory was 177.1 MB in the beginning and 159.3 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. [2020-07-17 12:14:45,818 INFO L168 Benchmark]: TraceAbstraction took 3171.65 ms. Allocated memory was 199.8 MB in the beginning and 226.0 MB in the end (delta: 26.2 MB). Free memory was 159.3 MB in the beginning and 105.2 MB in the end (delta: 54.2 MB). Peak memory consumption was 80.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:14:45,822 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 134.7 MB. Free memory is still 117.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.56 ms. Allocated memory is still 134.7 MB. Free memory was 99.5 MB in the beginning and 89.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 149.80 ms. Allocated memory was 134.7 MB in the beginning and 199.8 MB in the end (delta: 65.0 MB). Free memory was 89.1 MB in the beginning and 177.1 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 406.26 ms. Allocated memory is still 199.8 MB. Free memory was 177.1 MB in the beginning and 159.3 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3171.65 ms. Allocated memory was 199.8 MB in the beginning and 226.0 MB in the end (delta: 26.2 MB). Free memory was 159.3 MB in the beginning and 105.2 MB in the end (delta: 54.2 MB). Peak memory consumption was 80.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=6, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 VAL [\old(N)=0, a={-2:0}, b={-1:0}, i=0, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-1:0}, N=2] [L29] COND TRUE i