/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/sqm-iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:38:51,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:38:51,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:38:51,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:38:51,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:38:51,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:38:51,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:38:51,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:38:51,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:38:51,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:38:51,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:38:51,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:38:51,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:38:51,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:38:51,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:38:51,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:38:51,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:38:51,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:38:51,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:38:51,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:38:51,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:38:51,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:38:51,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:38:51,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:38:51,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:38:51,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:38:51,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:38:51,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:38:51,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:38:51,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:38:51,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:38:51,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:38:51,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:38:51,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:38:51,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:38:51,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:38:51,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:38:51,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:38:51,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:38:51,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:38:51,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:38:51,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 13:38:51,213 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:38:51,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:38:51,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:38:51,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:38:51,215 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:38:51,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:38:51,216 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:38:51,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:38:51,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:38:51,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:38:51,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:38:51,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:38:51,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:38:51,219 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:38:51,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:38:51,219 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:38:51,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:38:51,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:38:51,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:38:51,220 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:38:51,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:38:51,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:38:51,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:38:51,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:38:51,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:38:51,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:38:51,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:38:51,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:38:51,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:38:51,222 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:38:51,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:38:51,732 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:38:51,740 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:38:51,742 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:38:51,743 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:38:51,744 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sqm-iff.c [2020-09-25 13:38:51,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98bbe84ae/48e898eff5f24e08a0a6e2ad8b744f89/FLAGe284c6ddb [2020-09-25 13:38:52,337 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:38:52,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/sqm-iff.c [2020-09-25 13:38:52,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98bbe84ae/48e898eff5f24e08a0a6e2ad8b744f89/FLAGe284c6ddb [2020-09-25 13:38:52,663 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98bbe84ae/48e898eff5f24e08a0a6e2ad8b744f89 [2020-09-25 13:38:52,679 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:38:52,686 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:38:52,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:38:52,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:38:52,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:38:52,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:38:52" (1/1) ... [2020-09-25 13:38:52,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8fb8afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:52, skipping insertion in model container [2020-09-25 13:38:52,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:38:52" (1/1) ... [2020-09-25 13:38:52,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:38:52,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:38:53,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:38:53,085 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:38:53,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:38:53,132 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:38:53,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:53 WrapperNode [2020-09-25 13:38:53,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:38:53,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:38:53,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:38:53,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:38:53,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:53" (1/1) ... [2020-09-25 13:38:53,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:53" (1/1) ... [2020-09-25 13:38:53,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:53" (1/1) ... [2020-09-25 13:38:53,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:53" (1/1) ... [2020-09-25 13:38:53,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:53" (1/1) ... [2020-09-25 13:38:53,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:53" (1/1) ... [2020-09-25 13:38:53,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:53" (1/1) ... [2020-09-25 13:38:53,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:38:53,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:38:53,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:38:53,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:38:53,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:38:53,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:38:53,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:38:53,373 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 13:38:53,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 13:38:53,374 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:38:53,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:38:53,374 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 13:38:53,375 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 13:38:53,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 13:38:53,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 13:38:53,375 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 13:38:53,375 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:38:53,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 13:38:53,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 13:38:53,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 13:38:53,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:38:53,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:38:53,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 13:38:53,736 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:38:53,736 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 13:38:53,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:38:53 BoogieIcfgContainer [2020-09-25 13:38:53,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:38:53,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:38:53,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:38:53,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:38:53,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:38:52" (1/3) ... [2020-09-25 13:38:53,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3c0adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:38:53, skipping insertion in model container [2020-09-25 13:38:53,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:38:53" (2/3) ... [2020-09-25 13:38:53,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3c0adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:38:53, skipping insertion in model container [2020-09-25 13:38:53,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:38:53" (3/3) ... [2020-09-25 13:38:53,751 INFO L109 eAbstractionObserver]: Analyzing ICFG sqm-iff.c [2020-09-25 13:38:53,762 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:38:53,773 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:38:53,793 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:38:53,821 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:38:53,821 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:38:53,821 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:38:53,822 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:38:53,822 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:38:53,822 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:38:53,822 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:38:53,822 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:38:53,845 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-09-25 13:38:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 13:38:53,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:38:53,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:38:53,855 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:38:53,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:38:53,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1150160147, now seen corresponding path program 1 times [2020-09-25 13:38:53,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:38:53,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364229877] [2020-09-25 13:38:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:38:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:38:54,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:38:54,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364229877] [2020-09-25 13:38:54,136 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-09-25 13:38:54,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:38:54,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-09-25 13:38:54,137 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-09-25 13:38:54,140 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 13:38:54,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:38:54,169 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-25 13:38:54,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:38:54 BoogieIcfgContainer [2020-09-25 13:38:54,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 13:38:54,174 INFO L168 Benchmark]: Toolchain (without parser) took 1490.82 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 102.3 MB in the beginning and 143.0 MB in the end (delta: -40.7 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2020-09-25 13:38:54,175 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-25 13:38:54,176 INFO L168 Benchmark]: CACSL2BoogieTranslator took 446.23 ms. Allocated memory is still 146.3 MB. Free memory was 101.9 MB in the beginning and 91.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-25 13:38:54,177 INFO L168 Benchmark]: Boogie Preprocessor took 157.58 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 91.5 MB in the beginning and 180.1 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-25 13:38:54,178 INFO L168 Benchmark]: RCFGBuilder took 449.71 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 160.8 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2020-09-25 13:38:54,179 INFO L168 Benchmark]: TraceAbstraction took 427.18 ms. Allocated memory is still 202.9 MB. Free memory was 159.8 MB in the beginning and 143.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-09-25 13:38:54,184 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 446.23 ms. Allocated memory is still 146.3 MB. Free memory was 101.9 MB in the beginning and 91.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 157.58 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 91.5 MB in the beginning and 180.1 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 449.71 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 160.8 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 427.18 ms. Allocated memory is still 202.9 MB. Free memory was 159.8 MB in the beginning and 143.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 [L29] COND FALSE !(i