/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/ifcompf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:42:20,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:42:20,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:42:20,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:42:20,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:42:20,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:42:20,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:42:20,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:42:20,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:42:20,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:42:20,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:42:20,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:42:20,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:42:20,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:42:20,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:42:20,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:42:20,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:42:20,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:42:20,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:42:20,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:42:20,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:42:20,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:42:20,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:42:20,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:42:20,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:42:20,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:42:20,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:42:20,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:42:20,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:42:20,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:42:20,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:42:20,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:42:20,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:42:20,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:42:20,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:42:20,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:42:20,661 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:42:20,726 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:42:20,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:42:20,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:42:20,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:42:20,729 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:42:20,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:42:20,729 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:42:20,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:42:20,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:42:20,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:42:20,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:42:20,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:42:20,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:42:20,733 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:42:20,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:42:20,733 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:42:20,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:42:20,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:42:20,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:42:20,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:42:20,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:42:20,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:42:20,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:42:20,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:42:20,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:42:20,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:42:20,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:42:20,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:42:20,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:42:20,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:42:21,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:42:21,269 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:42:21,275 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:42:21,277 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:42:21,277 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:42:21,279 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifcompf.c [2020-09-04 13:42:21,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/507d4022e/d818ef5b20c549a3933e858e94249517/FLAGec288d7f3 [2020-09-04 13:42:22,039 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:42:22,040 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ifcompf.c [2020-09-04 13:42:22,049 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/507d4022e/d818ef5b20c549a3933e858e94249517/FLAGec288d7f3 [2020-09-04 13:42:22,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/507d4022e/d818ef5b20c549a3933e858e94249517 [2020-09-04 13:42:22,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:42:22,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:42:22,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:22,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:42:22,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:42:22,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:22,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12925ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22, skipping insertion in model container [2020-09-04 13:42:22,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:22,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:42:22,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:42:22,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:22,800 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:42:22,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:22,892 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:42:22,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22 WrapperNode [2020-09-04 13:42:22,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:22,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:42:22,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:42:22,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:42:23,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:23,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:23,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:23,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:23,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:23,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:23,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:23,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:42:23,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:42:23,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:42:23,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:42:23,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:23,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:42:23,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:42:23,200 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:42:23,200 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:42:23,200 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:42:23,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:42:23,200 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:42:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:42:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:42:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:42:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 13:42:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:42:23,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 13:42:23,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:42:23,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:42:23,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:42:23,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:42:23,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:42:23,583 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:42:23,584 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-04 13:42:23,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:23 BoogieIcfgContainer [2020-09-04 13:42:23,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:42:23,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:42:23,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:42:23,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:42:23,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:42:22" (1/3) ... [2020-09-04 13:42:23,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6f9fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:23, skipping insertion in model container [2020-09-04 13:42:23,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (2/3) ... [2020-09-04 13:42:23,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6f9fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:23, skipping insertion in model container [2020-09-04 13:42:23,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:23" (3/3) ... [2020-09-04 13:42:23,602 INFO L109 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2020-09-04 13:42:23,617 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:42:23,635 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:42:23,668 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:42:23,711 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:42:23,711 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:42:23,712 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:42:23,712 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:42:23,712 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:42:23,712 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:42:23,712 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:42:23,712 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:42:23,745 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-09-04 13:42:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 13:42:23,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:23,759 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] [2020-09-04 13:42:23,760 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:23,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:23,770 INFO L82 PathProgramCache]: Analyzing trace with hash -794599326, now seen corresponding path program 1 times [2020-09-04 13:42:23,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:23,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356770189] [2020-09-04 13:42:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:24,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:24,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:24,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356770189] [2020-09-04 13:42:24,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:24,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 13:42:24,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177657533] [2020-09-04 13:42:24,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 13:42:24,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:24,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 13:42:24,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:42:24,096 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-09-04 13:42:24,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:24,277 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2020-09-04 13:42:24,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:42:24,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-04 13:42:24,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:24,292 INFO L225 Difference]: With dead ends: 70 [2020-09-04 13:42:24,292 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 13:42:24,297 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 [2020-09-04 13:42:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 13:42:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-09-04 13:42:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 13:42:24,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-09-04 13:42:24,352 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2020-09-04 13:42:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:24,353 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-09-04 13:42:24,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 13:42:24,354 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-09-04 13:42:24,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 13:42:24,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:24,356 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] [2020-09-04 13:42:24,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:42:24,357 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:24,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:24,358 INFO L82 PathProgramCache]: Analyzing trace with hash -544938994, now seen corresponding path program 1 times [2020-09-04 13:42:24,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:24,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711134346] [2020-09-04 13:42:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:24,391 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:24,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475685975] [2020-09-04 13:42:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:24,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-04 13:42:24,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:24,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711134346] [2020-09-04 13:42:24,581 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:24,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475685975] [2020-09-04 13:42:24,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:24,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:42:24,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959601340] [2020-09-04 13:42:24,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:42:24,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:24,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:42:24,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:42:24,587 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2020-09-04 13:42:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:24,716 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2020-09-04 13:42:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:42:24,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-09-04 13:42:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:24,722 INFO L225 Difference]: With dead ends: 67 [2020-09-04 13:42:24,722 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 13:42:24,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:42:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 13:42:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-09-04 13:42:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-04 13:42:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-09-04 13:42:24,744 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 24 [2020-09-04 13:42:24,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:24,744 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-09-04 13:42:24,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:42:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-09-04 13:42:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 13:42:24,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:24,746 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, 1, 1, 1, 1, 1] [2020-09-04 13:42:24,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:42:24,964 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:24,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1796917477, now seen corresponding path program 1 times [2020-09-04 13:42:24,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:24,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824039286] [2020-09-04 13:42:24,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:25,007 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:25,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564531139] [2020-09-04 13:42:25,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:25,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-04 13:42:25,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:42:25,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824039286] [2020-09-04 13:42:25,126 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:25,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564531139] [2020-09-04 13:42:25,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:25,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 13:42:25,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412280425] [2020-09-04 13:42:25,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 13:42:25,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:25,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 13:42:25,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:42:25,129 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 3 states. [2020-09-04 13:42:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:25,208 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2020-09-04 13:42:25,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:42:25,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-09-04 13:42:25,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:25,211 INFO L225 Difference]: With dead ends: 72 [2020-09-04 13:42:25,211 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 13:42:25,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:42:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 13:42:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-09-04 13:42:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-04 13:42:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-09-04 13:42:25,222 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 33 [2020-09-04 13:42:25,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:25,222 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-09-04 13:42:25,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 13:42:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-09-04 13:42:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 13:42:25,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:25,225 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, 1, 1, 1, 1, 1] [2020-09-04 13:42:25,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:25,447 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:25,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:25,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1817991449, now seen corresponding path program 1 times [2020-09-04 13:42:25,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:25,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443719829] [2020-09-04 13:42:25,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:25,483 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:25,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871048392] [2020-09-04 13:42:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:25,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:42:25,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:25,598 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 [2020-09-04 13:42:25,599 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:25,608 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:25,608 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:25,610 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-09-04 13:42:25,671 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:25,672 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 [2020-09-04 13:42:25,673 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-09-04 13:42:25,689 INFO L625 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-09-04 13:42:25,689 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:25,690 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-09-04 13:42:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:42:25,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443719829] [2020-09-04 13:42:25,733 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:25,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871048392] [2020-09-04 13:42:25,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:25,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 13:42:25,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264381763] [2020-09-04 13:42:25,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:42:25,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:25,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:42:25,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:42:25,740 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 7 states. [2020-09-04 13:42:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:25,921 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-09-04 13:42:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:42:25,921 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-04 13:42:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:25,923 INFO L225 Difference]: With dead ends: 52 [2020-09-04 13:42:25,923 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 13:42:25,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:42:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 13:42:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-04 13:42:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 13:42:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-09-04 13:42:25,934 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 33 [2020-09-04 13:42:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:25,935 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-09-04 13:42:25,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:42:25,935 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-09-04 13:42:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 13:42:25,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:25,937 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, 1, 1, 1, 1, 1] [2020-09-04 13:42:26,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:26,151 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:26,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1651297135, now seen corresponding path program 1 times [2020-09-04 13:42:26,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:26,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214364378] [2020-09-04 13:42:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:26,187 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:26,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438608493] [2020-09-04 13:42:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:26,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:42:26,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:42:26,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214364378] [2020-09-04 13:42:26,319 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:26,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438608493] [2020-09-04 13:42:26,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:26,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 13:42:26,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004226375] [2020-09-04 13:42:26,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:42:26,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:26,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:42:26,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:42:26,323 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 7 states. [2020-09-04 13:42:26,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:26,581 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2020-09-04 13:42:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:42:26,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-09-04 13:42:26,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:26,583 INFO L225 Difference]: With dead ends: 113 [2020-09-04 13:42:26,583 INFO L226 Difference]: Without dead ends: 65 [2020-09-04 13:42:26,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:42:26,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-04 13:42:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2020-09-04 13:42:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-04 13:42:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-09-04 13:42:26,596 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2020-09-04 13:42:26,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:26,597 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-09-04 13:42:26,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:42:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-09-04 13:42:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-04 13:42:26,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:26,599 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1] [2020-09-04 13:42:26,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:26,814 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:26,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:26,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2142090186, now seen corresponding path program 1 times [2020-09-04 13:42:26,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:26,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694326807] [2020-09-04 13:42:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:26,855 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:26,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355580895] [2020-09-04 13:42:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:26,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-04 13:42:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:26,946 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2020-09-04 13:42:26,949 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:26,956 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:26,958 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:26,959 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:8 [2020-09-04 13:42:27,015 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-09-04 13:42:27,016 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:27,025 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:27,025 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:27,026 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-09-04 13:42:27,126 INFO L350 Elim1Store]: treesize reduction 34, result has 57.0 percent of original size [2020-09-04 13:42:27,126 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 59 [2020-09-04 13:42:27,129 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:27,170 INFO L625 ElimStorePlain]: treesize reduction 23, result has 65.2 percent of original size [2020-09-04 13:42:27,175 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:27,175 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:12 [2020-09-04 13:42:27,206 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-09-04 13:42:27,207 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:27,221 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:27,222 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:27,222 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-09-04 13:42:27,305 INFO L350 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2020-09-04 13:42:27,306 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2020-09-04 13:42:27,308 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:27,322 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:27,331 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-09-04 13:42:27,332 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:32 [2020-09-04 13:42:27,736 INFO L350 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2020-09-04 13:42:27,737 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 39 [2020-09-04 13:42:27,738 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:27,753 INFO L625 ElimStorePlain]: treesize reduction 23, result has 32.4 percent of original size [2020-09-04 13:42:27,755 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:27,755 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:7 [2020-09-04 13:42:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:42:27,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694326807] [2020-09-04 13:42:27,819 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:27,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355580895] [2020-09-04 13:42:27,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:27,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 13:42:27,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445724769] [2020-09-04 13:42:27,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 13:42:27,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:27,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 13:42:27,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:42:27,822 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 16 states. [2020-09-04 13:42:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:39,039 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-09-04 13:42:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:42:39,040 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-09-04 13:42:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:39,042 INFO L225 Difference]: With dead ends: 100 [2020-09-04 13:42:39,042 INFO L226 Difference]: Without dead ends: 70 [2020-09-04 13:42:39,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2020-09-04 13:42:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-04 13:42:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-09-04 13:42:39,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-04 13:42:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-09-04 13:42:39,056 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 50 [2020-09-04 13:42:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:39,057 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-09-04 13:42:39,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 13:42:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-09-04 13:42:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 13:42:39,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:39,059 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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] [2020-09-04 13:42:39,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-04 13:42:39,274 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:39,275 INFO L82 PathProgramCache]: Analyzing trace with hash 655680800, now seen corresponding path program 2 times [2020-09-04 13:42:39,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:39,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385465554] [2020-09-04 13:42:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:39,352 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:39,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11881156] [2020-09-04 13:42:39,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:39,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:42:39,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:39,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:42:39,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-04 13:42:39,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385465554] [2020-09-04 13:42:39,509 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:39,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11881156] [2020-09-04 13:42:39,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:39,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 13:42:39,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921837900] [2020-09-04 13:42:39,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:42:39,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:42:39,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:42:39,512 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 9 states. [2020-09-04 13:42:39,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:39,942 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2020-09-04 13:42:39,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:42:39,943 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-09-04 13:42:39,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:39,945 INFO L225 Difference]: With dead ends: 158 [2020-09-04 13:42:39,946 INFO L226 Difference]: Without dead ends: 82 [2020-09-04 13:42:39,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:42:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-04 13:42:39,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-09-04 13:42:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-04 13:42:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-09-04 13:42:39,961 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 58 [2020-09-04 13:42:39,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:39,961 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-09-04 13:42:39,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:42:39,962 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-09-04 13:42:39,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 13:42:39,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:39,963 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2020-09-04 13:42:40,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:40,178 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:40,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:40,179 INFO L82 PathProgramCache]: Analyzing trace with hash 404343461, now seen corresponding path program 3 times [2020-09-04 13:42:40,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:40,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871704129] [2020-09-04 13:42:40,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:40,216 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:40,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911769931] [2020-09-04 13:42:40,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:40,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-04 13:42:40,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-09-04 13:42:40,365 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:42:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:42:40,409 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:42:40,468 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:42:40,469 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:42:40,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:40,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:42:40 BoogieIcfgContainer [2020-09-04 13:42:40,809 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:42:40,812 INFO L168 Benchmark]: Toolchain (without parser) took 18443.76 ms. Allocated memory was 140.0 MB in the beginning and 265.3 MB in the end (delta: 125.3 MB). Free memory was 103.4 MB in the beginning and 235.7 MB in the end (delta: -132.2 MB). Peak memory consumption was 110.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:40,813 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:42:40,813 INFO L168 Benchmark]: CACSL2BoogieTranslator took 525.92 ms. Allocated memory is still 140.0 MB. Free memory was 103.2 MB in the beginning and 92.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:40,814 INFO L168 Benchmark]: Boogie Preprocessor took 207.53 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 92.6 MB in the beginning and 181.6 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:40,815 INFO L168 Benchmark]: RCFGBuilder took 487.05 ms. Allocated memory is still 204.5 MB. Free memory was 181.6 MB in the beginning and 163.0 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:40,816 INFO L168 Benchmark]: TraceAbstraction took 17216.69 ms. Allocated memory was 204.5 MB in the beginning and 265.3 MB in the end (delta: 60.8 MB). Free memory was 162.3 MB in the beginning and 235.7 MB in the end (delta: -73.4 MB). Peak memory consumption was 105.1 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:40,820 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 525.92 ms. Allocated memory is still 140.0 MB. Free memory was 103.2 MB in the beginning and 92.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 207.53 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 92.6 MB in the beginning and 181.6 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 487.05 ms. Allocated memory is still 204.5 MB. Free memory was 181.6 MB in the beginning and 163.0 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17216.69 ms. Allocated memory was 204.5 MB in the beginning and 265.3 MB in the end (delta: 60.8 MB). Free memory was 162.3 MB in the beginning and 235.7 MB in the end (delta: -73.4 MB). Peak memory consumption was 105.1 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)=9, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=3] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=3] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=3] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=3] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L28] long long *c = malloc(sizeof(long long)*N); [L30] i=0 VAL [\old(N)=0, a={1:0}, b={-2:0}, c={-1:0}, i=0, malloc(sizeof(long long)*N)={1:0}, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-1:0}, N=3] [L30] COND TRUE i