/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:44:07,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:44:07,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:44:07,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:44:07,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:44:07,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:44:07,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:44:07,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:44:07,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:44:07,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:44:07,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:44:07,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:44:07,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:44:07,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:44:07,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:44:07,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:44:07,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:44:07,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:44:07,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:44:07,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:44:07,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:44:07,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:44:07,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:44:07,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:44:07,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:44:07,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:44:07,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:44:07,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:44:07,256 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 [2020-11-06 22:44:07,313 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:44:07,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:44:07,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:44:07,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:44:07,319 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:44:07,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:44:07,319 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:44:07,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:44:07,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:44:07,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:44:07,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:44:07,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:44:07,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:44:07,323 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:44:07,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:44:07,323 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:44:07,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:44:07,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:44:07,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:44:07,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:44:07,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:44:07,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:44:07,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:44:07,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:44:07,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:44:07,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:44:07,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:44:07,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:44:07,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:44:07,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:44:07,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:44:07,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:44:07,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:44:07,853 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:44:07,854 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:44:07,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-11-06 22:44:07,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d233a2b/fa313258acf14540bf1e18f0c30a55ab/FLAGc5dd26354 [2020-11-06 22:44:08,567 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:44:08,568 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-11-06 22:44:08,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d233a2b/fa313258acf14540bf1e18f0c30a55ab/FLAGc5dd26354 [2020-11-06 22:44:08,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d233a2b/fa313258acf14540bf1e18f0c30a55ab [2020-11-06 22:44:08,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:44:08,937 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:44:08,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:08,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:44:08,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:44:08,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:08" (1/1) ... [2020-11-06 22:44:08,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d5ae7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:08, skipping insertion in model container [2020-11-06 22:44:08,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:08" (1/1) ... [2020-11-06 22:44:08,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:44:08,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:44:09,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:09,177 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:44:09,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:09,247 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:44:09,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:09 WrapperNode [2020-11-06 22:44:09,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:09,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:44:09,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:44:09,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:44:09,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:09" (1/1) ... [2020-11-06 22:44:09,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:09" (1/1) ... [2020-11-06 22:44:09,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:09" (1/1) ... [2020-11-06 22:44:09,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:09" (1/1) ... [2020-11-06 22:44:09,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:09" (1/1) ... [2020-11-06 22:44:09,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:09" (1/1) ... [2020-11-06 22:44:09,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:09" (1/1) ... [2020-11-06 22:44:09,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:44:09,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:44:09,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:44:09,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:44:09,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:09" (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 [2020-11-06 22:44:09,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:44:09,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:44:09,430 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:44:09,431 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:44:09,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:44:09,432 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:44:09,432 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:44:09,432 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:44:09,432 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:44:09,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:44:09,433 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:44:09,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:44:09,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:44:09,434 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-06 22:44:09,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:44:09,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-06 22:44:09,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:44:09,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:44:09,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:44:09,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:44:09,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:44:09,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:44:09,962 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:44:09,963 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-06 22:44:09,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:09 BoogieIcfgContainer [2020-11-06 22:44:09,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:44:09,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:44:09,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:44:09,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:44:09,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:08" (1/3) ... [2020-11-06 22:44:09,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5235b2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:09, skipping insertion in model container [2020-11-06 22:44:09,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:09" (2/3) ... [2020-11-06 22:44:09,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5235b2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:09, skipping insertion in model container [2020-11-06 22:44:09,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:09" (3/3) ... [2020-11-06 22:44:09,975 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-11-06 22:44:09,991 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:44:09,995 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:44:10,007 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:44:10,034 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:44:10,034 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:44:10,035 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:44:10,035 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:44:10,035 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:44:10,035 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:44:10,035 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:44:10,035 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:44:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-11-06 22:44:10,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:44:10,060 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:10,061 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] [2020-11-06 22:44:10,062 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:10,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:10,068 INFO L82 PathProgramCache]: Analyzing trace with hash -996507287, now seen corresponding path program 1 times [2020-11-06 22:44:10,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:10,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082905741] [2020-11-06 22:44:10,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:10,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:10,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:10,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082905741] [2020-11-06 22:44:10,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:10,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:44:10,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070420951] [2020-11-06 22:44:10,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:44:10,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:10,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:44:10,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:44:10,379 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-11-06 22:44:10,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:10,555 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2020-11-06 22:44:10,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:44:10,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-06 22:44:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:10,573 INFO L225 Difference]: With dead ends: 67 [2020-11-06 22:44:10,574 INFO L226 Difference]: Without dead ends: 32 [2020-11-06 22:44:10,587 INFO L677 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 [2020-11-06 22:44:10,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-06 22:44:10,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-06 22:44:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:44:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-11-06 22:44:10,635 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-11-06 22:44:10,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:10,636 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-11-06 22:44:10,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:44:10,636 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-11-06 22:44:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:44:10,637 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:10,637 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] [2020-11-06 22:44:10,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:44:10,638 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:10,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1837020483, now seen corresponding path program 1 times [2020-11-06 22:44:10,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:10,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052343239] [2020-11-06 22:44:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:10,670 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:10,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514614118] [2020-11-06 22:44:10,670 INFO L95 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 [2020-11-06 22:44:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:10,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 22:44:10,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:10,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052343239] [2020-11-06 22:44:10,883 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:10,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514614118] [2020-11-06 22:44:10,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:10,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:44:10,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141030801] [2020-11-06 22:44:10,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:44:10,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:10,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:44:10,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:44:10,890 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 4 states. [2020-11-06 22:44:11,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:11,000 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-11-06 22:44:11,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:44:11,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-06 22:44:11,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:11,004 INFO L225 Difference]: With dead ends: 58 [2020-11-06 22:44:11,004 INFO L226 Difference]: Without dead ends: 42 [2020-11-06 22:44:11,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:44:11,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-06 22:44:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-11-06 22:44:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-06 22:44:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-11-06 22:44:11,020 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2020-11-06 22:44:11,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:11,020 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-11-06 22:44:11,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:44:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-11-06 22:44:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:44:11,022 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:11,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:11,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:44:11,237 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:11,239 INFO L82 PathProgramCache]: Analyzing trace with hash 617062164, now seen corresponding path program 1 times [2020-11-06 22:44:11,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:11,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804537505] [2020-11-06 22:44:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:11,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:11,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:44:11,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804537505] [2020-11-06 22:44:11,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:11,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:44:11,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907013993] [2020-11-06 22:44:11,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:44:11,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:11,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:44:11,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:44:11,369 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 4 states. [2020-11-06 22:44:11,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:11,537 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-11-06 22:44:11,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:44:11,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-06 22:44:11,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:11,539 INFO L225 Difference]: With dead ends: 62 [2020-11-06 22:44:11,540 INFO L226 Difference]: Without dead ends: 42 [2020-11-06 22:44:11,541 INFO L677 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 [2020-11-06 22:44:11,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-06 22:44:11,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-11-06 22:44:11,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-06 22:44:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-11-06 22:44:11,551 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-11-06 22:44:11,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:11,552 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-11-06 22:44:11,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:44:11,552 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-11-06 22:44:11,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:44:11,553 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:11,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:11,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:44:11,554 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:11,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:11,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1010089174, now seen corresponding path program 1 times [2020-11-06 22:44:11,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:11,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681511096] [2020-11-06 22:44:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:11,579 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:11,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827005318] [2020-11-06 22:44:11,580 INFO L95 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 [2020-11-06 22:44:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:11,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:44:11,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:11,718 INFO L382 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 [2020-11-06 22:44:11,720 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:11,724 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:11,725 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:11,726 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-11-06 22:44:11,779 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:11,779 INFO L382 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 [2020-11-06 22:44:11,781 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-06 22:44:11,797 INFO L625 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-11-06 22:44:11,798 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:11,798 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-11-06 22:44:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:44:11,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681511096] [2020-11-06 22:44:11,840 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:11,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827005318] [2020-11-06 22:44:11,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:11,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:44:11,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291976889] [2020-11-06 22:44:11,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:44:11,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:11,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:44:11,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:44:11,843 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 7 states. [2020-11-06 22:44:11,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:11,971 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-11-06 22:44:11,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:44:11,971 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-11-06 22:44:11,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:11,973 INFO L225 Difference]: With dead ends: 48 [2020-11-06 22:44:11,973 INFO L226 Difference]: Without dead ends: 45 [2020-11-06 22:44:11,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:44:11,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-06 22:44:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-11-06 22:44:11,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-06 22:44:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-11-06 22:44:11,984 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 29 [2020-11-06 22:44:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:11,985 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-11-06 22:44:11,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:44:11,985 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-11-06 22:44:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-06 22:44:11,986 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:11,987 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:12,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:12,202 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:12,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1048457280, now seen corresponding path program 1 times [2020-11-06 22:44:12,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:12,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38330540] [2020-11-06 22:44:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:12,228 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:12,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967415860] [2020-11-06 22:44:12,229 INFO L95 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 [2020-11-06 22:44:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:12,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:44:12,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:44:12,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38330540] [2020-11-06 22:44:12,391 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:12,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967415860] [2020-11-06 22:44:12,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:44:12,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-06 22:44:12,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300669089] [2020-11-06 22:44:12,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:44:12,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:12,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:44:12,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:44:12,394 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 7 states. [2020-11-06 22:44:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:12,593 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-11-06 22:44:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:44:12,594 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-11-06 22:44:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:12,596 INFO L225 Difference]: With dead ends: 93 [2020-11-06 22:44:12,596 INFO L226 Difference]: Without dead ends: 56 [2020-11-06 22:44:12,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:44:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-06 22:44:12,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-11-06 22:44:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-06 22:44:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-11-06 22:44:12,607 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2020-11-06 22:44:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:12,607 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-11-06 22:44:12,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:44:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-11-06 22:44:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-06 22:44:12,609 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:12,609 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, 1] [2020-11-06 22:44:12,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:12,823 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:12,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:12,824 INFO L82 PathProgramCache]: Analyzing trace with hash 481130819, now seen corresponding path program 1 times [2020-11-06 22:44:12,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:12,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397410170] [2020-11-06 22:44:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:12,850 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:12,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406076434] [2020-11-06 22:44:12,851 INFO L95 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 [2020-11-06 22:44:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:44:12,948 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:44:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:44:12,980 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:44:13,024 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:44:13,024 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:44:13,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:13,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:44:13 BoogieIcfgContainer [2020-11-06 22:44:13,299 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:44:13,300 INFO L168 Benchmark]: Toolchain (without parser) took 4367.99 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 151.0 MB in the beginning and 100.5 MB in the end (delta: 50.5 MB). Peak memory consumption was 86.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:13,301 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 176.2 MB. Free memory is still 147.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:44:13,302 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.94 ms. Allocated memory is still 176.2 MB. Free memory was 150.3 MB in the beginning and 140.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:13,303 INFO L168 Benchmark]: Boogie Preprocessor took 87.94 ms. Allocated memory is still 176.2 MB. Free memory was 140.5 MB in the beginning and 138.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:13,304 INFO L168 Benchmark]: RCFGBuilder took 625.08 ms. Allocated memory is still 176.2 MB. Free memory was 138.8 MB in the beginning and 158.0 MB in the end (delta: -19.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:13,305 INFO L168 Benchmark]: TraceAbstraction took 3332.34 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 157.3 MB in the beginning and 100.5 MB in the end (delta: 56.8 MB). Peak memory consumption was 91.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:13,309 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 176.2 MB. Free memory is still 147.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 309.94 ms. Allocated memory is still 176.2 MB. Free memory was 150.3 MB in the beginning and 140.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 87.94 ms. Allocated memory is still 176.2 MB. Free memory was 140.5 MB in the beginning and 138.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 625.08 ms. Allocated memory is still 176.2 MB. Free memory was 138.8 MB in the beginning and 158.0 MB in the end (delta: -19.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3332.34 ms. Allocated memory was 176.2 MB in the beginning and 211.8 MB in the end (delta: 35.7 MB). Free memory was 157.3 MB in the beginning and 100.5 MB in the end (delta: 56.8 MB). Peak memory consumption was 91.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=7, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [\old(N)=0, a={-2:0}, b={-1:0}, i=0, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-1:0}, N=2] [L31] COND TRUE i