/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/ifeqn3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:42:21,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:42:21,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:42:21,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:42:21,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:42:21,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:42:21,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:42:21,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:42:21,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:42:21,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:42:21,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:42:21,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:42:21,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:42:21,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:42:21,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:42:21,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:42:21,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:42:21,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:42:21,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:42:21,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:42:21,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:42:21,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:42:21,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:42:21,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:42:21,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 13:42:21,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 13:42:21,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 13:42:21,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 13:42:21,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 13:42:21,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 13:42:21,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:42:21,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:42:21,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:42:21,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:42:21,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:42:21,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:42:21,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:42:21,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:42:21,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:42:21,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:42:21,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:42:21,602 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 13:42:21,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:42:21,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:42:21,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:42:21,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:42:21,632 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:42:21,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:42:21,633 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:42:21,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:42:21,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:42:21,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:42:21,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:42:21,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:42:21,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:42:21,634 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:42:21,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:42:21,635 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:42:21,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:42:21,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:42:21,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:42:21,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:42:21,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:42:21,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:42:21,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:42:21,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:42:21,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:42:21,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:42:21,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:42:21,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:42:21,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:42:21,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:42:22,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:42:22,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:42:22,143 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:42:22,144 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:42:22,145 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:42:22,146 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-09-04 13:42:22,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10f51ce90/21511a9280964862b5af77f357c27b3e/FLAG2a6ccd1be [2020-09-04 13:42:22,723 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:42:22,724 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-09-04 13:42:22,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10f51ce90/21511a9280964862b5af77f357c27b3e/FLAG2a6ccd1be [2020-09-04 13:42:23,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/10f51ce90/21511a9280964862b5af77f357c27b3e [2020-09-04 13:42:23,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:42:23,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:42:23,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:23,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:42:23,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:42:23,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:23" (1/1) ... [2020-09-04 13:42:23,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c5b0a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:23, skipping insertion in model container [2020-09-04 13:42:23,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:23" (1/1) ... [2020-09-04 13:42:23,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:42:23,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:42:23,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:23,380 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:42:23,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:23,423 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:42:23,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:23 WrapperNode [2020-09-04 13:42:23,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:23,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:42:23,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:42:23,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:42:23,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:23" (1/1) ... [2020-09-04 13:42:23,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:23" (1/1) ... [2020-09-04 13:42:23,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:23" (1/1) ... [2020-09-04 13:42:23,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:23" (1/1) ... [2020-09-04 13:42:23,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:23" (1/1) ... [2020-09-04 13:42:23,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:23" (1/1) ... [2020-09-04 13:42:23,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:23" (1/1) ... [2020-09-04 13:42:23,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:42:23,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:42:23,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:42:23,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:42:23,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:23" (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 13:42:23,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:42:23,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:42:23,657 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:42:23,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:42:23,658 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:42:23,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:42:23,658 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:42:23,658 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:42:23,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:42:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:42:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 13:42:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:42:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 13:42:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:42:23,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:42:23,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:42:23,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:42:23,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:42:24,006 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:42:24,007 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 13:42:24,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:24 BoogieIcfgContainer [2020-09-04 13:42:24,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:42:24,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:42:24,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:42:24,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:42:24,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:42:23" (1/3) ... [2020-09-04 13:42:24,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1f12f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:24, skipping insertion in model container [2020-09-04 13:42:24,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:23" (2/3) ... [2020-09-04 13:42:24,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1f12f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:24, skipping insertion in model container [2020-09-04 13:42:24,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:24" (3/3) ... [2020-09-04 13:42:24,022 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2020-09-04 13:42:24,033 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:42:24,043 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:42:24,064 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:42:24,090 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:42:24,090 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:42:24,090 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:42:24,091 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:42:24,091 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:42:24,091 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:42:24,091 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:42:24,091 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:42:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-09-04 13:42:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 13:42:24,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:24,125 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] [2020-09-04 13:42:24,126 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:24,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:24,134 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-09-04 13:42:24,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:24,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819983270] [2020-09-04 13:42:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:24,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:24,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:24,375 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 13:42:24,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819983270] [2020-09-04 13:42:24,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:24,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 13:42:24,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190721559] [2020-09-04 13:42:24,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 13:42:24,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:24,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 13:42:24,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:42:24,408 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-09-04 13:42:24,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:24,626 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-09-04 13:42:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:42:24,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-04 13:42:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:24,643 INFO L225 Difference]: With dead ends: 62 [2020-09-04 13:42:24,644 INFO L226 Difference]: Without dead ends: 31 [2020-09-04 13:42:24,650 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 13:42:24,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-04 13:42:24,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-04 13:42:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-04 13:42:24,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-09-04 13:42:24,722 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-09-04 13:42:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:24,722 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-09-04 13:42:24,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 13:42:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-09-04 13:42:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 13:42:24,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:24,725 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] [2020-09-04 13:42:24,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:42:24,726 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:24,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-09-04 13:42:24,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:24,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381015948] [2020-09-04 13:42:24,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:24,803 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:24,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724387343] [2020-09-04 13:42:24,804 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 13:42:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:24,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-04 13:42:24,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:24,963 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 13:42:24,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381015948] [2020-09-04 13:42:24,964 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:24,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724387343] [2020-09-04 13:42:24,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:24,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:42:24,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142490205] [2020-09-04 13:42:24,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:42:24,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:24,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:42:24,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:42:24,968 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-09-04 13:42:25,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:25,054 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-09-04 13:42:25,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:42:25,055 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-09-04 13:42:25,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:25,059 INFO L225 Difference]: With dead ends: 56 [2020-09-04 13:42:25,059 INFO L226 Difference]: Without dead ends: 41 [2020-09-04 13:42:25,060 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 [2020-09-04 13:42:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-04 13:42:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-09-04 13:42:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:42:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-09-04 13:42:25,076 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-09-04 13:42:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:25,076 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-09-04 13:42:25,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:42:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-09-04 13:42:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 13:42:25,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:25,078 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] [2020-09-04 13:42:25,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:42:25,289 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:25,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-09-04 13:42:25,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:25,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270863649] [2020-09-04 13:42:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:25,375 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:25,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133798543] [2020-09-04 13:42:25,376 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 13:42:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:25,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:42:25,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:25,505 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 13:42:25,505 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:25,512 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:25,513 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:25,514 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-09-04 13:42:25,571 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:25,571 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 13:42:25,573 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-09-04 13:42:25,606 INFO L625 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-09-04 13:42:25,607 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 13:42:25,607 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-09-04 13:42:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:42:25,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270863649] [2020-09-04 13:42:25,660 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:25,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133798543] [2020-09-04 13:42:25,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:25,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 13:42:25,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244767530] [2020-09-04 13:42:25,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:42:25,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:25,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:42:25,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:42:25,663 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-09-04 13:42:25,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:25,817 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-09-04 13:42:25,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:42:25,818 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-04 13:42:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:25,819 INFO L225 Difference]: With dead ends: 52 [2020-09-04 13:42:25,820 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 13:42:25,820 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 [2020-09-04 13:42:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 13:42:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-09-04 13:42:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-04 13:42:25,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-09-04 13:42:25,843 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-09-04 13:42:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:25,844 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-09-04 13:42:25,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:42:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-09-04 13:42:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 13:42:25,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:25,846 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] [2020-09-04 13:42:26,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:26,061 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:26,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:26,062 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-09-04 13:42:26,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:26,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775493164] [2020-09-04 13:42:26,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:26,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:26,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:42:26,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775493164] [2020-09-04 13:42:26,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:26,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:42:26,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414245367] [2020-09-04 13:42:26,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:42:26,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:26,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:42:26,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:42:26,174 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 4 states. [2020-09-04 13:42:26,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:26,278 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-09-04 13:42:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:42:26,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-09-04 13:42:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:26,280 INFO L225 Difference]: With dead ends: 74 [2020-09-04 13:42:26,281 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 13:42:26,281 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 [2020-09-04 13:42:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 13:42:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-09-04 13:42:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-04 13:42:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-09-04 13:42:26,290 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-09-04 13:42:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:26,290 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-09-04 13:42:26,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:42:26,291 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-09-04 13:42:26,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 13:42:26,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:26,292 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] [2020-09-04 13:42:26,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 13:42:26,292 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-09-04 13:42:26,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:26,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012832307] [2020-09-04 13:42:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:26,313 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:26,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983281574] [2020-09-04 13:42:26,313 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 13:42:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:26,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:42:26,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:42:26,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012832307] [2020-09-04 13:42:26,422 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:26,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983281574] [2020-09-04 13:42:26,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:26,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 13:42:26,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812125186] [2020-09-04 13:42:26,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:42:26,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:26,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:42:26,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:42:26,425 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 7 states. [2020-09-04 13:42:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:26,566 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-09-04 13:42:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:42:26,567 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-04 13:42:26,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:26,568 INFO L225 Difference]: With dead ends: 91 [2020-09-04 13:42:26,568 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 13:42:26,569 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 [2020-09-04 13:42:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 13:42:26,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-09-04 13:42:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 13:42:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-09-04 13:42:26,576 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-09-04 13:42:26,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:26,577 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-09-04 13:42:26,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:42:26,577 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-09-04 13:42:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-04 13:42:26,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:26,579 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] [2020-09-04 13:42:26,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:26,780 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:26,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:26,780 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-09-04 13:42:26,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:26,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642541964] [2020-09-04 13:42:26,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:26,802 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:26,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768622606] [2020-09-04 13:42:26,803 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 13:42:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:26,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-04 13:42:26,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:26,870 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 10 treesize of output 8 [2020-09-04 13:42:26,871 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:26,876 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:26,877 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:26,877 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-09-04 13:42:26,890 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 13:42:26,891 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:26,898 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:26,899 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:26,899 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-09-04 13:42:26,940 INFO L350 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2020-09-04 13:42:26,941 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 1 case distinctions, treesize of input 27 treesize of output 22 [2020-09-04 13:42:26,942 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:26,950 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:26,951 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:26,951 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:21 [2020-09-04 13:42:26,999 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-09-04 13:42:27,000 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 28 treesize of output 30 [2020-09-04 13:42:27,001 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:27,015 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:27,016 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:27,016 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2020-09-04 13:42:27,100 INFO L350 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2020-09-04 13:42:27,100 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 44 [2020-09-04 13:42:27,103 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:27,118 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:27,122 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 13:42:27,123 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:43 [2020-09-04 13:42:27,505 INFO L350 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2020-09-04 13:42:27,506 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 44 [2020-09-04 13:42:27,509 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:27,525 INFO L625 ElimStorePlain]: treesize reduction 23, result has 32.4 percent of original size [2020-09-04 13:42:27,526 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 13:42:27,527 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:57, output treesize:7 [2020-09-04 13:42:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:27,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642541964] [2020-09-04 13:42:27,610 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:27,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768622606] [2020-09-04 13:42:27,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:27,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 13:42:27,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724765014] [2020-09-04 13:42:27,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 13:42:27,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:27,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 13:42:27,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:42:27,613 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 16 states. [2020-09-04 13:42:36,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:36,988 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2020-09-04 13:42:36,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 13:42:36,989 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-09-04 13:42:36,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:36,991 INFO L225 Difference]: With dead ends: 95 [2020-09-04 13:42:36,991 INFO L226 Difference]: Without dead ends: 65 [2020-09-04 13:42:36,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-04 13:42:36,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-04 13:42:36,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-09-04 13:42:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-04 13:42:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-09-04 13:42:37,001 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 42 [2020-09-04 13:42:37,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:37,002 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-09-04 13:42:37,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 13:42:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-09-04 13:42:37,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-04 13:42:37,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:37,003 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-04 13:42:37,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:37,217 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:37,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:37,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1235795269, now seen corresponding path program 2 times [2020-09-04 13:42:37,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:37,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769091154] [2020-09-04 13:42:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:37,238 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:37,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642574456] [2020-09-04 13:42:37,239 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 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 13:42:37,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:42:37,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:37,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:42:37,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 13:42:37,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769091154] [2020-09-04 13:42:37,386 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:37,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642574456] [2020-09-04 13:42:37,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:37,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 13:42:37,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778802767] [2020-09-04 13:42:37,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:42:37,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:37,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:42:37,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:42:37,388 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 9 states. [2020-09-04 13:42:37,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:37,671 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2020-09-04 13:42:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:42:37,671 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-09-04 13:42:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:37,673 INFO L225 Difference]: With dead ends: 127 [2020-09-04 13:42:37,673 INFO L226 Difference]: Without dead ends: 69 [2020-09-04 13:42:37,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 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 13:42:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-04 13:42:37,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-09-04 13:42:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-04 13:42:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-09-04 13:42:37,686 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 50 [2020-09-04 13:42:37,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:37,686 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-09-04 13:42:37,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:42:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-09-04 13:42:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-04 13:42:37,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:37,690 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-09-04 13:42:37,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-09-04 13:42:37,891 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:37,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1577312680, now seen corresponding path program 3 times [2020-09-04 13:42:37,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:37,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208470766] [2020-09-04 13:42:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:37,916 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:37,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178881271] [2020-09-04 13:42:37,917 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 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 13:42:37,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-04 13:42:37,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-09-04 13:42:37,998 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:42:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:42:38,030 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:42:38,101 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:42:38,101 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:42:38,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:38,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:42:38 BoogieIcfgContainer [2020-09-04 13:42:38,361 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:42:38,363 INFO L168 Benchmark]: Toolchain (without parser) took 15272.88 ms. Allocated memory was 139.5 MB in the beginning and 246.9 MB in the end (delta: 107.5 MB). Free memory was 102.5 MB in the beginning and 128.3 MB in the end (delta: -25.8 MB). Peak memory consumption was 81.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:38,364 INFO L168 Benchmark]: CDTParser took 1.51 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:42:38,365 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.08 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 91.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:38,366 INFO L168 Benchmark]: Boogie Preprocessor took 140.62 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 91.8 MB in the beginning and 180.7 MB in the end (delta: -88.9 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:38,366 INFO L168 Benchmark]: RCFGBuilder took 446.65 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 163.0 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:38,367 INFO L168 Benchmark]: TraceAbstraction took 14347.71 ms. Allocated memory was 203.4 MB in the beginning and 246.9 MB in the end (delta: 43.5 MB). Free memory was 162.4 MB in the beginning and 128.3 MB in the end (delta: 34.1 MB). Peak memory consumption was 77.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:38,370 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.51 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 332.08 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 91.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.62 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 91.8 MB in the beginning and 180.7 MB in the end (delta: -88.9 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 446.65 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 163.0 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14347.71 ms. Allocated memory was 203.4 MB in the beginning and 246.9 MB in the end (delta: 43.5 MB). Free memory was 162.4 MB in the beginning and 128.3 MB in the end (delta: 34.1 MB). Peak memory consumption was 77.6 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)=10, 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); [L29] i=0 VAL [\old(N)=0, a={1:0}, b={-1:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={1:0}, N=3] [L29] COND TRUE i