/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/ifcompf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:44:04,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:44:04,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:44:04,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:44:04,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:44:04,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:44:04,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:44:04,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:44:04,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:44:04,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:44:04,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:44:04,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:44:04,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:44:04,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:44:04,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:44:04,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:44:04,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:44:04,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:44:04,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:44:04,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:44:04,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:44:04,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:44:04,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:44:04,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:44:04,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:44:04,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:44:04,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:44:04,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:44:04,263 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 22:44:04,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:44:04,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:44:04,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:44:04,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:44:04,302 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:44:04,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:44:04,305 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:44:04,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:44:04,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:44:04,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:44:04,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:44:04,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:44:04,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:44:04,307 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:44:04,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:44:04,309 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:44:04,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:44:04,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:44:04,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:44:04,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:44:04,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:44:04,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:44:04,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:44:04,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:44:04,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:44:04,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:44:04,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:44:04,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:44:04,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:44:04,312 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:44:04,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:44:04,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:44:04,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:44:04,764 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:44:04,765 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:44:04,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifcompf.c [2020-11-06 22:44:04,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1da847082/022d99547f764512b67fc43b0fb67a84/FLAG3cfdc1542 [2020-11-06 22:44:05,547 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:44:05,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifcompf.c [2020-11-06 22:44:05,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1da847082/022d99547f764512b67fc43b0fb67a84/FLAG3cfdc1542 [2020-11-06 22:44:05,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1da847082/022d99547f764512b67fc43b0fb67a84 [2020-11-06 22:44:05,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:44:05,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:44:05,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:05,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:44:05,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:44:05,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:05" (1/1) ... [2020-11-06 22:44:05,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bc4f5ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:05, skipping insertion in model container [2020-11-06 22:44:05,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:05" (1/1) ... [2020-11-06 22:44:05,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:44:05,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:44:06,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:06,130 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:44:06,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:06,176 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:44:06,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06 WrapperNode [2020-11-06 22:44:06,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:06,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:44:06,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:44:06,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:44:06,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (1/1) ... [2020-11-06 22:44:06,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (1/1) ... [2020-11-06 22:44:06,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (1/1) ... [2020-11-06 22:44:06,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (1/1) ... [2020-11-06 22:44:06,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (1/1) ... [2020-11-06 22:44:06,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (1/1) ... [2020-11-06 22:44:06,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (1/1) ... [2020-11-06 22:44:06,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:44:06,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:44:06,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:44:06,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:44:06,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (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 22:44:06,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:44:06,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:44:06,317 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:44:06,317 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:44:06,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:44:06,318 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:44:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:44:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:44:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:44:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:44:06,319 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:44:06,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:44:06,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:44:06,319 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-06 22:44:06,319 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:44:06,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-06 22:44:06,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:44:06,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:44:06,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:44:06,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:44:06,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:44:06,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:44:06,805 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:44:06,806 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-06 22:44:06,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:06 BoogieIcfgContainer [2020-11-06 22:44:06,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:44:06,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:44:06,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:44:06,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:44:06,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:05" (1/3) ... [2020-11-06 22:44:06,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7028941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:06, skipping insertion in model container [2020-11-06 22:44:06,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:06" (2/3) ... [2020-11-06 22:44:06,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7028941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:06, skipping insertion in model container [2020-11-06 22:44:06,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:06" (3/3) ... [2020-11-06 22:44:06,820 INFO L111 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2020-11-06 22:44:06,838 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:44:06,841 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:44:06,857 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:44:06,889 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:44:06,889 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:44:06,889 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:44:06,889 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:44:06,890 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:44:06,890 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:44:06,890 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:44:06,890 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:44:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-06 22:44:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:44:06,919 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:06,921 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] [2020-11-06 22:44:06,921 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:06,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:06,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2130740261, now seen corresponding path program 1 times [2020-11-06 22:44:06,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:06,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268907845] [2020-11-06 22:44:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:07,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:07,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:07,305 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 22:44:07,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268907845] [2020-11-06 22:44:07,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:07,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:44:07,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234983537] [2020-11-06 22:44:07,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:44:07,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:07,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:44:07,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:44:07,333 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-11-06 22:44:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:07,487 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-11-06 22:44:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:44:07,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-11-06 22:44:07,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:07,498 INFO L225 Difference]: With dead ends: 75 [2020-11-06 22:44:07,498 INFO L226 Difference]: Without dead ends: 36 [2020-11-06 22:44:07,501 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 22:44:07,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-06 22:44:07,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-06 22:44:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-06 22:44:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-11-06 22:44:07,553 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2020-11-06 22:44:07,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:07,556 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-11-06 22:44:07,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:44:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-11-06 22:44:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:44:07,558 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:07,558 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] [2020-11-06 22:44:07,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:44:07,560 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:07,561 INFO L82 PathProgramCache]: Analyzing trace with hash -139633948, now seen corresponding path program 1 times [2020-11-06 22:44:07,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:07,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138886410] [2020-11-06 22:44:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:07,624 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:07,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047468562] [2020-11-06 22:44:07,625 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 22:44:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:07,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 22:44:07,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:07,837 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 22:44:07,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138886410] [2020-11-06 22:44:07,838 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:07,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047468562] [2020-11-06 22:44:07,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:07,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:44:07,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024082411] [2020-11-06 22:44:07,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:44:07,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:07,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:44:07,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:44:07,842 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 4 states. [2020-11-06 22:44:07,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:07,942 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2020-11-06 22:44:07,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:44:07,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-06 22:44:07,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:07,945 INFO L225 Difference]: With dead ends: 69 [2020-11-06 22:44:07,946 INFO L226 Difference]: Without dead ends: 49 [2020-11-06 22:44:07,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 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 22:44:07,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-06 22:44:07,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2020-11-06 22:44:07,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-06 22:44:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-11-06 22:44:07,963 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2020-11-06 22:44:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:07,964 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-11-06 22:44:07,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:44:07,964 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-11-06 22:44:07,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-06 22:44:07,966 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:07,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:08,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:44:08,181 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:08,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1013651816, now seen corresponding path program 1 times [2020-11-06 22:44:08,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:08,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856860977] [2020-11-06 22:44:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:08,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:08,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:44:08,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856860977] [2020-11-06 22:44:08,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:08,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:44:08,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962134326] [2020-11-06 22:44:08,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:44:08,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:08,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:44:08,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:44:08,388 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 4 states. [2020-11-06 22:44:08,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:08,571 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-11-06 22:44:08,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:44:08,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-11-06 22:44:08,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:08,573 INFO L225 Difference]: With dead ends: 74 [2020-11-06 22:44:08,573 INFO L226 Difference]: Without dead ends: 49 [2020-11-06 22:44:08,574 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 22:44:08,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-06 22:44:08,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2020-11-06 22:44:08,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-06 22:44:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-11-06 22:44:08,586 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2020-11-06 22:44:08,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:08,586 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-11-06 22:44:08,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:44:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-11-06 22:44:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-06 22:44:08,588 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:08,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:08,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:44:08,589 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:08,589 INFO L82 PathProgramCache]: Analyzing trace with hash 266211862, now seen corresponding path program 1 times [2020-11-06 22:44:08,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:08,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402066095] [2020-11-06 22:44:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:08,612 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:08,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150719863] [2020-11-06 22:44:08,613 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 22:44:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:08,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:44:08,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:08,768 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 22:44:08,769 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:08,773 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:08,773 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:08,773 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-11-06 22:44:08,828 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:08,829 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 22:44:08,832 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-06 22:44:08,847 INFO L625 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-11-06 22:44:08,848 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 22:44:08,849 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-11-06 22:44:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:44:08,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402066095] [2020-11-06 22:44:08,901 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:08,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150719863] [2020-11-06 22:44:08,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:08,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:44:08,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543853374] [2020-11-06 22:44:08,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:44:08,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:08,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:44:08,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:44:08,905 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 7 states. [2020-11-06 22:44:09,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:09,081 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-11-06 22:44:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:44:09,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-11-06 22:44:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:09,086 INFO L225 Difference]: With dead ends: 54 [2020-11-06 22:44:09,086 INFO L226 Difference]: Without dead ends: 51 [2020-11-06 22:44:09,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 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 22:44:09,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-06 22:44:09,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-11-06 22:44:09,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-06 22:44:09,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-11-06 22:44:09,112 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 34 [2020-11-06 22:44:09,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:09,113 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-11-06 22:44:09,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:44:09,113 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-11-06 22:44:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-06 22:44:09,116 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:09,117 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:09,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:09,318 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:09,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:09,320 INFO L82 PathProgramCache]: Analyzing trace with hash -394265600, now seen corresponding path program 1 times [2020-11-06 22:44:09,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:09,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391907410] [2020-11-06 22:44:09,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:09,341 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:09,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619541356] [2020-11-06 22:44:09,341 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 22:44:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:09,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:44:09,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:44:09,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391907410] [2020-11-06 22:44:09,484 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:09,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619541356] [2020-11-06 22:44:09,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:44:09,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-06 22:44:09,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832638508] [2020-11-06 22:44:09,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:44:09,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:09,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:44:09,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:44:09,487 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 7 states. [2020-11-06 22:44:09,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:09,720 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2020-11-06 22:44:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:44:09,721 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-06 22:44:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:09,722 INFO L225 Difference]: With dead ends: 115 [2020-11-06 22:44:09,723 INFO L226 Difference]: Without dead ends: 66 [2020-11-06 22:44:09,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 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 22:44:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-06 22:44:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-11-06 22:44:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-06 22:44:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-11-06 22:44:09,736 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 42 [2020-11-06 22:44:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:09,737 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-11-06 22:44:09,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:44:09,737 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-11-06 22:44:09,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-06 22:44:09,739 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:09,739 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:09,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:09,953 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:09,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:09,955 INFO L82 PathProgramCache]: Analyzing trace with hash 339216840, now seen corresponding path program 1 times [2020-11-06 22:44:09,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:09,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717358209] [2020-11-06 22:44:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:09,981 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:09,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999964013] [2020-11-06 22:44:09,982 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 22:44:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:10,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-06 22:44:10,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:10,096 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2020-11-06 22:44:10,098 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:10,104 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:10,106 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:10,107 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:8 [2020-11-06 22:44:10,129 INFO L382 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 [2020-11-06 22:44:10,129 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:10,136 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:10,137 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:10,137 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-11-06 22:44:10,227 INFO L348 Elim1Store]: treesize reduction 34, result has 57.0 percent of original size [2020-11-06 22:44:10,228 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 59 [2020-11-06 22:44:10,230 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:10,267 INFO L625 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2020-11-06 22:44:10,270 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 22:44:10,271 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:12 [2020-11-06 22:44:10,289 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-11-06 22:44:10,290 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:10,298 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:10,298 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:10,299 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-11-06 22:44:10,353 INFO L348 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2020-11-06 22:44:10,354 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2020-11-06 22:44:10,355 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:10,364 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:10,368 INFO L547 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. [2020-11-06 22:44:10,368 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:32 [2020-11-06 22:44:10,648 INFO L348 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2020-11-06 22:44:10,649 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 39 [2020-11-06 22:44:10,650 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:10,668 INFO L625 ElimStorePlain]: treesize reduction 23, result has 32.4 percent of original size [2020-11-06 22:44:10,669 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:10,670 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:7 [2020-11-06 22:44:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:44:10,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717358209] [2020-11-06 22:44:10,757 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:10,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999964013] [2020-11-06 22:44:10,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:44:10,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-06 22:44:10,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808921265] [2020-11-06 22:44:10,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-06 22:44:10,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:10,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-06 22:44:10,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:44:10,760 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 16 states. [2020-11-06 22:44:19,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:19,990 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2020-11-06 22:44:19,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:44:19,991 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-11-06 22:44:19,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:19,993 INFO L225 Difference]: With dead ends: 102 [2020-11-06 22:44:19,993 INFO L226 Difference]: Without dead ends: 71 [2020-11-06 22:44:19,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:44:19,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-06 22:44:20,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-11-06 22:44:20,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-06 22:44:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-11-06 22:44:20,024 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 51 [2020-11-06 22:44:20,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:20,024 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-11-06 22:44:20,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-06 22:44:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-11-06 22:44:20,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-06 22:44:20,027 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:20,028 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:20,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:20,244 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:20,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:20,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1568136782, now seen corresponding path program 2 times [2020-11-06 22:44:20,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:20,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105613451] [2020-11-06 22:44:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:20,267 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:20,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256595478] [2020-11-06 22:44:20,268 INFO L93 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 [2020-11-06 22:44:20,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:44:20,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:44:20,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:44:20,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-06 22:44:20,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105613451] [2020-11-06 22:44:20,468 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:20,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256595478] [2020-11-06 22:44:20,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:44:20,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-06 22:44:20,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995353919] [2020-11-06 22:44:20,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:44:20,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:20,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:44:20,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:44:20,471 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 9 states. [2020-11-06 22:44:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:20,893 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2020-11-06 22:44:20,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:44:20,894 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-11-06 22:44:20,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:20,896 INFO L225 Difference]: With dead ends: 160 [2020-11-06 22:44:20,897 INFO L226 Difference]: Without dead ends: 83 [2020-11-06 22:44:20,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:44:20,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-06 22:44:20,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2020-11-06 22:44:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-06 22:44:20,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-11-06 22:44:20,912 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 59 [2020-11-06 22:44:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:20,913 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-11-06 22:44:20,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:44:20,913 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-11-06 22:44:20,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-06 22:44:20,915 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:20,915 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:21,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-06 22:44:21,130 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:21,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1233878934, now seen corresponding path program 3 times [2020-11-06 22:44:21,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:21,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307032141] [2020-11-06 22:44:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:21,157 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:21,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357562723] [2020-11-06 22:44:21,157 INFO L93 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 [2020-11-06 22:44:21,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-06 22:44:21,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-06 22:44:21,345 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:44:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:44:21,415 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:44:21,491 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:44:21,491 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:44:21,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:21,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:44:21 BoogieIcfgContainer [2020-11-06 22:44:21,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:44:21,793 INFO L168 Benchmark]: Toolchain (without parser) took 15915.67 ms. Allocated memory was 158.3 MB in the beginning and 203.4 MB in the end (delta: 45.1 MB). Free memory was 134.5 MB in the beginning and 137.9 MB in the end (delta: -3.5 MB). Peak memory consumption was 42.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:21,793 INFO L168 Benchmark]: CDTParser took 1.40 ms. Allocated memory is still 158.3 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:44:21,794 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.48 ms. Allocated memory is still 158.3 MB. Free memory was 133.8 MB in the beginning and 123.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:21,795 INFO L168 Benchmark]: Boogie Preprocessor took 47.97 ms. Allocated memory is still 158.3 MB. Free memory was 123.7 MB in the beginning and 122.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:21,795 INFO L168 Benchmark]: RCFGBuilder took 581.97 ms. Allocated memory is still 158.3 MB. Free memory was 121.9 MB in the beginning and 139.7 MB in the end (delta: -17.7 MB). Peak memory consumption was 19.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:21,796 INFO L168 Benchmark]: TraceAbstraction took 14980.81 ms. Allocated memory was 158.3 MB in the beginning and 203.4 MB in the end (delta: 45.1 MB). Free memory was 139.1 MB in the beginning and 137.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 45.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:21,799 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.40 ms. Allocated memory is still 158.3 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 292.48 ms. Allocated memory is still 158.3 MB. Free memory was 133.8 MB in the beginning and 123.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.97 ms. Allocated memory is still 158.3 MB. Free memory was 123.7 MB in the beginning and 122.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 581.97 ms. Allocated memory is still 158.3 MB. Free memory was 121.9 MB in the beginning and 139.7 MB in the end (delta: -17.7 MB). Peak memory consumption was 19.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14980.81 ms. Allocated memory was 158.3 MB in the beginning and 203.4 MB in the end (delta: 45.1 MB). Free memory was 139.1 MB in the beginning and 137.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 45.8 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)=15, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=3] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=3] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=3] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=3] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] i=0 VAL [\old(N)=0, a={-2:0}, b={-4:0}, c={-3:0}, i=0, malloc(sizeof(long long)*N)={-4:0}, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-3:0}, N=3] [L32] COND TRUE i