/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/egcd.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:26:44,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:26:44,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:26:44,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:26:44,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:26:44,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:26:44,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:26:44,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:26:44,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:26:44,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:26:44,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:26:44,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:26:44,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:26:44,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:26:44,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:26:44,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:26:44,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:26:44,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:26:44,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:26:44,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:26:44,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:26:44,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:26:44,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:26:44,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:26:44,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:26:44,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:26:44,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:26:44,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:26:44,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:26:44,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:26:44,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:26:44,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:26:44,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:26:44,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:26:44,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:26:44,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:26:44,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:26:44,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:26:44,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:26:44,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:26:44,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:26:44,652 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 [2020-10-12 16:26:44,675 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:26:44,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:26:44,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:26:44,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:26:44,677 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:26:44,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:26:44,678 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:26:44,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:26:44,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:26:44,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:26:44,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:26:44,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:26:44,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:26:44,679 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:26:44,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:26:44,679 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:26:44,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:26:44,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:26:44,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:26:44,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:26:44,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:26:44,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:26:44,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:26:44,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:26:44,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:26:44,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:26:44,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:26:44,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:26:44,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:26:44,684 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 -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:26:45,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:26:45,041 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:26:45,046 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:26:45,048 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:26:45,050 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:26:45,050 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd.c [2020-10-12 16:26:45,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e70f53af/cca2bfc2271c464dba6368419625ae75/FLAG6c66f3014 [2020-10-12 16:26:45,573 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:26:45,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/egcd.c [2020-10-12 16:26:45,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e70f53af/cca2bfc2271c464dba6368419625ae75/FLAG6c66f3014 [2020-10-12 16:26:45,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e70f53af/cca2bfc2271c464dba6368419625ae75 [2020-10-12 16:26:45,955 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:26:45,957 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:26:45,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:26:45,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:26:45,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:26:45,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:26:45" (1/1) ... [2020-10-12 16:26:45,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38260a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:45, skipping insertion in model container [2020-10-12 16:26:45,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:26:45" (1/1) ... [2020-10-12 16:26:45,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:26:45,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:26:46,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:26:46,159 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:26:46,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:26:46,197 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:26:46,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:46 WrapperNode [2020-10-12 16:26:46,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:26:46,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:26:46,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:26:46,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:26:46,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:46" (1/1) ... [2020-10-12 16:26:46,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:46" (1/1) ... [2020-10-12 16:26:46,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:46" (1/1) ... [2020-10-12 16:26:46,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:46" (1/1) ... [2020-10-12 16:26:46,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:46" (1/1) ... [2020-10-12 16:26:46,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:46" (1/1) ... [2020-10-12 16:26:46,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:46" (1/1) ... [2020-10-12 16:26:46,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:26:46,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:26:46,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:26:46,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:26:46,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:46" (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 [2020-10-12 16:26:46,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:26:46,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:26:46,377 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 16:26:46,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:26:46,378 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:26:46,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:26:46,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 16:26:46,380 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 16:26:46,380 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 16:26:46,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:26:46,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:26:46,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:26:46,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:26:46,602 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:26:46,602 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:26:46,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:26:46 BoogieIcfgContainer [2020-10-12 16:26:46,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:26:46,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:26:46,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:26:46,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:26:46,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:26:45" (1/3) ... [2020-10-12 16:26:46,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a089ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:26:46, skipping insertion in model container [2020-10-12 16:26:46,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:26:46" (2/3) ... [2020-10-12 16:26:46,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a089ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:26:46, skipping insertion in model container [2020-10-12 16:26:46,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:26:46" (3/3) ... [2020-10-12 16:26:46,615 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd.c [2020-10-12 16:26:46,626 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:26:46,634 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:26:46,648 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:26:46,673 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:26:46,674 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:26:46,674 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:26:46,674 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:26:46,674 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:26:46,674 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:26:46,674 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:26:46,675 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:26:46,694 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-12 16:26:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:26:46,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:46,702 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:46,703 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:46,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:46,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1709960313, now seen corresponding path program 1 times [2020-10-12 16:26:46,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:46,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857052595] [2020-10-12 16:26:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:46,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:46,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:46,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:46,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:46,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:26:46,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:26:46,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-12 16:26:46,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:46,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:46,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-12 16:26:46,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:46,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:26:47,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:26:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:47,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:47,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:47,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:26:47,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:26:47,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:26:47,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:47,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:47,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:47,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:47,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:26:47,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 16:26:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:47,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:47,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:47,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:47,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:26:47,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:26:47,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 16:26:47,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:47,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:47,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:26:47,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:47,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:26:47,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-12 16:26:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:26:47,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:47,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:26:47,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:26:47,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:26:47,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:26:47,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 16:26:47,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:26:47,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:26:47,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 16:26:47,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:26:47,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:26:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:26:47,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857052595] [2020-10-12 16:26:47,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:26:47,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-12 16:26:47,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511680258] [2020-10-12 16:26:47,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-12 16:26:47,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:26:47,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-12 16:26:47,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-12 16:26:47,097 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-12 16:26:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:26:47,121 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2020-10-12 16:26:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-12 16:26:47,122 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-10-12 16:26:47,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:26:47,130 INFO L225 Difference]: With dead ends: 60 [2020-10-12 16:26:47,130 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 16:26:47,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-12 16:26:47,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 16:26:47,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-12 16:26:47,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 16:26:47,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-12 16:26:47,173 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 21 [2020-10-12 16:26:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:26:47,173 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-12 16:26:47,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-12 16:26:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-12 16:26:47,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:26:47,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:26:47,176 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:26:47,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:26:47,177 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:26:47,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:26:47,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1380569729, now seen corresponding path program 1 times [2020-10-12 16:26:47,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:26:47,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498853038] [2020-10-12 16:26:47,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:26:47,193 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-12 16:26:47,193 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-12 16:26:47,193 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 16:26:47,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:26:47,217 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-12 16:26:47,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 04:26:47 BoogieIcfgContainer [2020-10-12 16:26:47,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 16:26:47,220 INFO L168 Benchmark]: Toolchain (without parser) took 1262.30 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 102.6 MB in the beginning and 131.0 MB in the end (delta: -28.4 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. [2020-10-12 16:26:47,221 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-12 16:26:47,222 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.71 ms. Allocated memory is still 139.5 MB. Free memory was 102.4 MB in the beginning and 92.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-12 16:26:47,223 INFO L168 Benchmark]: Boogie Preprocessor took 113.52 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.0 MB in the beginning and 179.3 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-10-12 16:26:47,224 INFO L168 Benchmark]: RCFGBuilder took 295.08 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 165.2 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-10-12 16:26:47,225 INFO L168 Benchmark]: TraceAbstraction took 609.12 ms. Allocated memory is still 201.3 MB. Free memory was 165.2 MB in the beginning and 131.0 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. [2020-10-12 16:26:47,230 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 239.71 ms. Allocated memory is still 139.5 MB. Free memory was 102.4 MB in the beginning and 92.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.52 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.0 MB in the beginning and 179.3 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 295.08 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 165.2 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 609.12 ms. Allocated memory is still 201.3 MB. Free memory was 165.2 MB in the beginning and 131.0 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 11]: 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 a, b, p, q, r, s; [L18] int x, y; [L19] x = __VERIFIER_nondet_int() [L20] y = __VERIFIER_nondet_int() [L21] CALL assume_abort_if_not(x >= 1) [L6] COND FALSE !(!cond) [L21] RET assume_abort_if_not(x >= 1) [L22] CALL assume_abort_if_not(y >= 1) [L6] COND FALSE !(!cond) [L22] RET assume_abort_if_not(y >= 1) [L24] a = x [L25] b = y [L26] p = 1 [L27] q = 0 [L28] r = 0 [L29] s = 1 [L31] COND TRUE 1 [L32] CALL __VERIFIER_assert(1 == p * s - r * q) [L9] COND TRUE !(cond) [L11] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 400 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...