/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 0.1.25-267fbe0 [2020-07-17 12:14:39,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:14:39,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:14:39,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:14:39,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:14:39,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:14:39,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:14:39,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:14:39,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:14:39,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:14:39,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:14:39,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:14:39,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:14:39,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:14:39,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:14:39,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:14:39,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:14:39,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:14:39,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:14:39,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:14:39,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:14:39,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:14:39,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:14:39,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:14:39,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 12:14:39,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 12:14:39,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 12:14:39,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 12:14:39,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 12:14:39,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 12:14:39,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 12:14:39,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 12:14:39,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 12:14:39,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 12:14:39,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 12:14:39,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 12:14:39,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 12:14:39,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 12:14:39,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:14:39,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:14:39,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:14:39,681 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 12:14:39,705 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:14:39,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:14:39,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:14:39,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:14:39,708 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:14:39,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:14:39,709 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:14:39,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:14:39,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:14:39,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:14:39,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:14:39,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:14:39,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:14:39,712 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:14:39,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:14:39,713 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:14:39,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:14:39,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:14:39,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:14:39,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:14:39,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:14:39,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:14:39,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:14:39,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:14:39,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:14:39,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:14:39,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:14:39,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:14:39,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:14:39,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:14:39,999 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:14:40,011 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:14:40,016 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:14:40,020 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:14:40,020 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:14:40,021 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-07-17 12:14:40,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9731f70a0/948686983ac243ef8a9665c8b8aa6d71/FLAGf87aac9be [2020-07-17 12:14:40,612 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:14:40,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-07-17 12:14:40,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9731f70a0/948686983ac243ef8a9665c8b8aa6d71/FLAGf87aac9be [2020-07-17 12:14:40,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9731f70a0/948686983ac243ef8a9665c8b8aa6d71 [2020-07-17 12:14:40,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:14:40,979 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:14:40,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:14:40,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:14:40,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:14:40,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:14:40" (1/1) ... [2020-07-17 12:14:40,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7add82dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:40, skipping insertion in model container [2020-07-17 12:14:40,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:14:40" (1/1) ... [2020-07-17 12:14:41,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:14:41,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:14:41,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:14:41,215 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:14:41,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:14:41,255 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:14:41,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:41 WrapperNode [2020-07-17 12:14:41,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:14:41,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:14:41,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:14:41,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:14:41,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:41" (1/1) ... [2020-07-17 12:14:41,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:41" (1/1) ... [2020-07-17 12:14:41,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:41" (1/1) ... [2020-07-17 12:14:41,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:41" (1/1) ... [2020-07-17 12:14:41,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:41" (1/1) ... [2020-07-17 12:14:41,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:41" (1/1) ... [2020-07-17 12:14:41,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:41" (1/1) ... [2020-07-17 12:14:41,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:14:41,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:14:41,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:14:41,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:14:41,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:14:41,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:14:41,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:14:41,457 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:14:41,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:14:41,457 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:14:41,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:14:41,458 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:14:41,458 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:14:41,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:14:41,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:14:41,458 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 12:14:41,458 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:14:41,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 12:14:41,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 12:14:41,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 12:14:41,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:14:41,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:14:41,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 12:14:41,803 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:14:41,804 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 12:14:41,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:14:41 BoogieIcfgContainer [2020-07-17 12:14:41,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:14:41,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:14:41,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:14:41,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:14:41,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:14:40" (1/3) ... [2020-07-17 12:14:41,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e641b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:14:41, skipping insertion in model container [2020-07-17 12:14:41,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:41" (2/3) ... [2020-07-17 12:14:41,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e641b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:14:41, skipping insertion in model container [2020-07-17 12:14:41,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:14:41" (3/3) ... [2020-07-17 12:14:41,816 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2020-07-17 12:14:41,826 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:14:41,833 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:14:41,848 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:14:41,876 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:14:41,876 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:14:41,877 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:14:41,877 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:14:41,877 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:14:41,877 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:14:41,877 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:14:41,877 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:14:41,896 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-17 12:14:41,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:14:41,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:41,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:14:41,903 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:41,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:41,909 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-17 12:14:41,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:41,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493105663] [2020-07-17 12:14:41,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:14:42,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493105663] [2020-07-17 12:14:42,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:14:42,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:14:42,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893607640] [2020-07-17 12:14:42,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:14:42,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:42,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:14:42,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:14:42,180 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-07-17 12:14:42,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:14:42,318 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-17 12:14:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:14:42,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-17 12:14:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:14:42,328 INFO L225 Difference]: With dead ends: 62 [2020-07-17 12:14:42,329 INFO L226 Difference]: Without dead ends: 31 [2020-07-17 12:14:42,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:14:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-17 12:14:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-17 12:14:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-17 12:14:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-17 12:14:42,382 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-17 12:14:42,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:14:42,382 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-17 12:14:42,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:14:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-17 12:14:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:14:42,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:42,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:14:42,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:14:42,385 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:42,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:42,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-17 12:14:42,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:42,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279575510] [2020-07-17 12:14:42,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:42,412 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:14:42,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81870018] [2020-07-17 12:14:42,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:14:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:42,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-17 12:14:42,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:14:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:14:42,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279575510] [2020-07-17 12:14:42,535 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:14:42,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81870018] [2020-07-17 12:14:42,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:14:42,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:14:42,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493868180] [2020-07-17 12:14:42,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:14:42,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:42,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:14:42,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:14:42,539 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-17 12:14:42,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:14:42,632 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-17 12:14:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:14:42,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-17 12:14:42,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:14:42,636 INFO L225 Difference]: With dead ends: 56 [2020-07-17 12:14:42,637 INFO L226 Difference]: Without dead ends: 41 [2020-07-17 12:14:42,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:14:42,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-17 12:14:42,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-17 12:14:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 12:14:42,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-17 12:14:42,653 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-17 12:14:42,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:14:42,653 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-17 12:14:42,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:14:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-17 12:14:42,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:14:42,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:42,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:14:42,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-17 12:14:42,870 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:42,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:42,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-17 12:14:42,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:42,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097847765] [2020-07-17 12:14:42,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:42,906 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:14:42,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058827402] [2020-07-17 12:14:42,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:14:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:42,962 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 12:14:42,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:14:43,017 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-17 12:14:43,017 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:43,022 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:14:43,022 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:14:43,023 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-17 12:14:43,076 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:14:43,077 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-17 12:14:43,079 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-17 12:14:43,114 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-17 12:14:43,115 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:14:43,115 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-17 12:14:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 12:14:43,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097847765] [2020-07-17 12:14:43,156 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:14:43,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058827402] [2020-07-17 12:14:43,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:14:43,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 12:14:43,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033400051] [2020-07-17 12:14:43,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 12:14:43,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:43,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 12:14:43,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:14:43,161 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-17 12:14:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:14:43,348 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-17 12:14:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:14:43,349 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-17 12:14:43,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:14:43,352 INFO L225 Difference]: With dead ends: 52 [2020-07-17 12:14:43,352 INFO L226 Difference]: Without dead ends: 50 [2020-07-17 12:14:43,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:14:43,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-17 12:14:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-07-17 12:14:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-17 12:14:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-17 12:14:43,370 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-07-17 12:14:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:14:43,371 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-17 12:14:43,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 12:14:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-17 12:14:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:14:43,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:43,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:14:43,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:14:43,587 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:43,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:43,588 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-17 12:14:43,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:43,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642880498] [2020-07-17 12:14:43,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 12:14:43,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642880498] [2020-07-17 12:14:43,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:14:43,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 12:14:43,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091839357] [2020-07-17 12:14:43,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 12:14:43,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:43,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 12:14:43,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:14:43,691 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 4 states. [2020-07-17 12:14:43,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:14:43,792 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-07-17 12:14:43,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 12:14:43,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-07-17 12:14:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:14:43,794 INFO L225 Difference]: With dead ends: 74 [2020-07-17 12:14:43,794 INFO L226 Difference]: Without dead ends: 45 [2020-07-17 12:14:43,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 12:14:43,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-17 12:14:43,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-07-17 12:14:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-17 12:14:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-17 12:14:43,804 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-07-17 12:14:43,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:14:43,805 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-17 12:14:43,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 12:14:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-17 12:14:43,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-17 12:14:43,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:43,806 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:14:43,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 12:14:43,807 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:43,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:43,808 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-17 12:14:43,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:43,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594753959] [2020-07-17 12:14:43,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:43,828 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:14:43,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231328480] [2020-07-17 12:14:43,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:14:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:43,898 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:14:43,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:14:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 12:14:43,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594753959] [2020-07-17 12:14:43,976 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:14:43,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231328480] [2020-07-17 12:14:43,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:14:43,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 12:14:43,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32819888] [2020-07-17 12:14:43,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 12:14:43,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:43,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 12:14:43,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:14:43,981 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 7 states. [2020-07-17 12:14:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:14:44,172 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-07-17 12:14:44,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:14:44,174 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-07-17 12:14:44,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:14:44,176 INFO L225 Difference]: With dead ends: 91 [2020-07-17 12:14:44,176 INFO L226 Difference]: Without dead ends: 55 [2020-07-17 12:14:44,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:14:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-17 12:14:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-17 12:14:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 12:14:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-17 12:14:44,205 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-17 12:14:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:14:44,206 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-17 12:14:44,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 12:14:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-17 12:14:44,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-17 12:14:44,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:44,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:14:44,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:14:44,426 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:44,427 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-17 12:14:44,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:44,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842664375] [2020-07-17 12:14:44,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:44,450 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:14:44,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743149868] [2020-07-17 12:14:44,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:14:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:44,514 INFO L264 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-17 12:14:44,521 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:14:44,545 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 [2020-07-17 12:14:44,546 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:44,552 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:14:44,553 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:14:44,553 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-07-17 12:14:44,568 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 [2020-07-17 12:14:44,569 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:44,578 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:14:44,578 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:14:44,579 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-07-17 12:14:44,626 INFO L350 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2020-07-17 12:14:44,627 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 [2020-07-17 12:14:44,628 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:44,636 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:14:44,637 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:14:44,637 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-07-17 12:14:44,682 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-17 12:14:44,683 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 34 treesize of output 32 [2020-07-17 12:14:44,684 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:44,696 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:14:44,697 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:14:44,697 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-07-17 12:14:44,766 INFO L350 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2020-07-17 12:14:44,767 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 53 treesize of output 46 [2020-07-17 12:14:44,769 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:44,782 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:14:44,787 INFO L544 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. [2020-07-17 12:14:44,787 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:53 [2020-07-17 12:14:49,327 INFO L350 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2020-07-17 12:14:49,328 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 60 treesize of output 46 [2020-07-17 12:14:49,329 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:49,348 INFO L624 ElimStorePlain]: treesize reduction 23, result has 32.4 percent of original size [2020-07-17 12:14:49,349 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:14:49,349 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:7 [2020-07-17 12:14:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:14:49,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842664375] [2020-07-17 12:14:49,433 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:14:49,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743149868] [2020-07-17 12:14:49,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:14:49,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-17 12:14:49,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692132737] [2020-07-17 12:14:49,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-17 12:14:49,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:49,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-17 12:14:49,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=194, Unknown=2, NotChecked=0, Total=240 [2020-07-17 12:14:49,435 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 16 states. [2020-07-17 12:15:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:04,442 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2020-07-17 12:15:04,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 12:15:04,448 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-07-17 12:15:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:04,449 INFO L225 Difference]: With dead ends: 95 [2020-07-17 12:15:04,450 INFO L226 Difference]: Without dead ends: 65 [2020-07-17 12:15:04,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=97, Invalid=407, Unknown=2, NotChecked=0, Total=506 [2020-07-17 12:15:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-17 12:15:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-07-17 12:15:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-17 12:15:04,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-07-17 12:15:04,476 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 42 [2020-07-17 12:15:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:04,478 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-07-17 12:15:04,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-17 12:15:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-07-17 12:15:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-17 12:15:04,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:04,483 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] [2020-07-17 12:15:04,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:04,700 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1235795269, now seen corresponding path program 2 times [2020-07-17 12:15:04,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:04,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901174428] [2020-07-17 12:15:04,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:04,723 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:15:04,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128362665] [2020-07-17 12:15:04,723 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:04,785 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:15:04,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:04,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 12:15:04,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-17 12:15:04,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901174428] [2020-07-17 12:15:04,872 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:15:04,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128362665] [2020-07-17 12:15:04,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:15:04,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 12:15:04,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785751221] [2020-07-17 12:15:04,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 12:15:04,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 12:15:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:15:04,874 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 9 states. [2020-07-17 12:15:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:05,211 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2020-07-17 12:15:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 12:15:05,215 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-07-17 12:15:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:05,217 INFO L225 Difference]: With dead ends: 127 [2020-07-17 12:15:05,217 INFO L226 Difference]: Without dead ends: 69 [2020-07-17 12:15:05,218 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 [2020-07-17 12:15:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-17 12:15:05,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-07-17 12:15:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-17 12:15:05,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-07-17 12:15:05,244 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 50 [2020-07-17 12:15:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:05,245 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-07-17 12:15:05,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 12:15:05,245 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-07-17 12:15:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-17 12:15:05,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:05,250 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] [2020-07-17 12:15:05,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-17 12:15:05,451 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:05,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:05,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1577312680, now seen corresponding path program 3 times [2020-07-17 12:15:05,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:05,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100324097] [2020-07-17 12:15:05,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:05,495 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:15:05,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207686032] [2020-07-17 12:15:05,496 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:06,387 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-17 12:15:06,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-17 12:15:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:15:06,481 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 12:15:06,482 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 12:15:06,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:06,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:15:06 BoogieIcfgContainer [2020-07-17 12:15:06,753 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:15:06,756 INFO L168 Benchmark]: Toolchain (without parser) took 25777.72 ms. Allocated memory was 139.5 MB in the beginning and 245.9 MB in the end (delta: 106.4 MB). Free memory was 103.3 MB in the beginning and 147.4 MB in the end (delta: -44.1 MB). Peak memory consumption was 62.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:06,757 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 12:15:06,757 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.89 ms. Allocated memory is still 139.5 MB. Free memory was 103.1 MB in the beginning and 92.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:06,759 INFO L168 Benchmark]: Boogie Preprocessor took 129.76 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.7 MB in the beginning and 181.5 MB in the end (delta: -88.8 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:06,759 INFO L168 Benchmark]: RCFGBuilder took 421.80 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 164.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:06,760 INFO L168 Benchmark]: TraceAbstraction took 24943.64 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 163.5 MB in the beginning and 149.3 MB in the end (delta: 14.2 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:06,764 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.89 ms. Allocated memory is still 139.5 MB. Free memory was 103.1 MB in the beginning and 92.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.76 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.7 MB in the beginning and 181.5 MB in the end (delta: -88.8 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 421.80 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 164.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24943.64 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 163.5 MB in the beginning and 149.3 MB in the end (delta: 14.2 MB). Peak memory consumption was 56.2 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)=5, 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={-2:0}, i=0, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-1:0}, N=3] [L29] COND TRUE i