/usr/bin/java -ea -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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-18 06:40:12,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-18 06:40:12,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-18 06:40:12,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-18 06:40:12,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-18 06:40:12,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-18 06:40:12,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-18 06:40:12,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-18 06:40:12,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-18 06:40:12,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-18 06:40:12,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-18 06:40:12,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-18 06:40:12,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-18 06:40:12,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-18 06:40:12,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-18 06:40:12,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-18 06:40:12,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-18 06:40:12,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-18 06:40:12,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-18 06:40:12,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-18 06:40:12,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-18 06:40:12,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-18 06:40:12,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-18 06:40:12,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-18 06:40:12,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-18 06:40:12,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-18 06:40:12,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-18 06:40:12,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-18 06:40:12,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-18 06:40:12,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-18 06:40:12,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-18 06:40:12,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-18 06:40:12,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-18 06:40:12,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-18 06:40:12,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-18 06:40:12,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-18 06:40:12,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-18 06:40:12,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-18 06:40:12,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-18 06:40:12,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-18 06:40:12,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-18 06:40:12,560 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-18 06:40:12,569 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-18 06:40:12,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-18 06:40:12,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-18 06:40:12,570 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-18 06:40:12,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-18 06:40:12,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-18 06:40:12,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-18 06:40:12,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-18 06:40:12,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-18 06:40:12,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-18 06:40:12,571 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-18 06:40:12,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-18 06:40:12,572 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-18 06:40:12,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-18 06:40:12,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-18 06:40:12,573 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-18 06:40:12,573 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-18 06:40:12,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-18 06:40:12,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-18 06:40:12,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-18 06:40:12,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-18 06:40:12,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-18 06:40:12,574 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-07-18 06:40:12,846 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-18 06:40:12,859 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-18 06:40:12,863 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-18 06:40:12,864 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-18 06:40:12,864 INFO L275 PluginConnector]: CDTParser initialized [2020-07-18 06:40:12,865 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-18 06:40:12,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/487175174/2044bd2e106d43879c04f769a0b4354f/FLAG2341dfe85 [2020-07-18 06:40:13,364 INFO L306 CDTParser]: Found 1 translation units. [2020-07-18 06:40:13,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-18 06:40:13,369 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/487175174/2044bd2e106d43879c04f769a0b4354f/FLAG2341dfe85 [2020-07-18 06:40:13,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/487175174/2044bd2e106d43879c04f769a0b4354f [2020-07-18 06:40:13,744 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-18 06:40:13,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-18 06:40:13,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-18 06:40:13,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-18 06:40:13,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-18 06:40:13,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 06:40:13" (1/1) ... [2020-07-18 06:40:13,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e0b013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:40:13, skipping insertion in model container [2020-07-18 06:40:13,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 06:40:13" (1/1) ... [2020-07-18 06:40:13,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-18 06:40:13,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-18 06:40:13,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 06:40:13,971 INFO L203 MainTranslator]: Completed pre-run [2020-07-18 06:40:14,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 06:40:14,016 INFO L208 MainTranslator]: Completed translation [2020-07-18 06:40:14,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:40:14 WrapperNode [2020-07-18 06:40:14,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-18 06:40:14,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-18 06:40:14,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-18 06:40:14,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-18 06:40:14,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:40:14" (1/1) ... [2020-07-18 06:40:14,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:40:14" (1/1) ... [2020-07-18 06:40:14,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:40:14" (1/1) ... [2020-07-18 06:40:14,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:40:14" (1/1) ... [2020-07-18 06:40:14,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:40:14" (1/1) ... [2020-07-18 06:40:14,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:40:14" (1/1) ... [2020-07-18 06:40:14,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:40:14" (1/1) ... [2020-07-18 06:40:14,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-18 06:40:14,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-18 06:40:14,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-18 06:40:14,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-18 06:40:14,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:40:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-18 06:40:14,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-18 06:40:14,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-18 06:40:14,183 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-18 06:40:14,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-18 06:40:14,184 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-18 06:40:14,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-18 06:40:14,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-18 06:40:14,184 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-18 06:40:14,184 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-18 06:40:14,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-18 06:40:14,185 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-18 06:40:14,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-18 06:40:14,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-18 06:40:14,487 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-18 06:40:14,487 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-18 06:40:14,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 06:40:14 BoogieIcfgContainer [2020-07-18 06:40:14,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-18 06:40:14,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-18 06:40:14,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-18 06:40:14,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-18 06:40:14,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.07 06:40:13" (1/3) ... [2020-07-18 06:40:14,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7fe51f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 06:40:14, skipping insertion in model container [2020-07-18 06:40:14,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:40:14" (2/3) ... [2020-07-18 06:40:14,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7fe51f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 06:40:14, skipping insertion in model container [2020-07-18 06:40:14,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 06:40:14" (3/3) ... [2020-07-18 06:40:14,499 INFO L109 eAbstractionObserver]: Analyzing ICFG geo3.c [2020-07-18 06:40:14,509 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-18 06:40:14,516 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-18 06:40:14,531 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-18 06:40:14,552 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-18 06:40:14,553 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-18 06:40:14,553 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-18 06:40:14,553 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-18 06:40:14,553 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-18 06:40:14,553 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-18 06:40:14,553 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-18 06:40:14,554 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-18 06:40:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-18 06:40:14,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-18 06:40:14,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 06:40:14,583 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] [2020-07-18 06:40:14,584 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 06:40:14,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 06:40:14,590 INFO L82 PathProgramCache]: Analyzing trace with hash 713645626, now seen corresponding path program 1 times [2020-07-18 06:40:14,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 06:40:14,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059827921] [2020-07-18 06:40:14,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 06:40:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 06:40:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 06:40:14,759 INFO L280 TraceCheckUtils]: 0: Hoare triple {43#true} assume true; {43#true} is VALID [2020-07-18 06:40:14,760 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {43#true} {43#true} #67#return; {43#true} is VALID [2020-07-18 06:40:14,762 INFO L263 TraceCheckUtils]: 0: Hoare triple {43#true} call ULTIMATE.init(); {43#true} is VALID [2020-07-18 06:40:14,762 INFO L280 TraceCheckUtils]: 1: Hoare triple {43#true} assume true; {43#true} is VALID [2020-07-18 06:40:14,763 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {43#true} {43#true} #67#return; {43#true} is VALID [2020-07-18 06:40:14,763 INFO L263 TraceCheckUtils]: 3: Hoare triple {43#true} call #t~ret3 := main(); {43#true} is VALID [2020-07-18 06:40:14,763 INFO L280 TraceCheckUtils]: 4: Hoare triple {43#true} havoc ~z~0; {43#true} is VALID [2020-07-18 06:40:14,764 INFO L280 TraceCheckUtils]: 5: Hoare triple {43#true} havoc ~a~0; {43#true} is VALID [2020-07-18 06:40:14,764 INFO L280 TraceCheckUtils]: 6: Hoare triple {43#true} havoc ~k~0; {43#true} is VALID [2020-07-18 06:40:14,764 INFO L280 TraceCheckUtils]: 7: Hoare triple {43#true} havoc ~x~0; {43#true} is VALID [2020-07-18 06:40:14,765 INFO L280 TraceCheckUtils]: 8: Hoare triple {43#true} havoc ~y~0; {43#true} is VALID [2020-07-18 06:40:14,765 INFO L280 TraceCheckUtils]: 9: Hoare triple {43#true} havoc ~c~0; {43#true} is VALID [2020-07-18 06:40:14,765 INFO L280 TraceCheckUtils]: 10: Hoare triple {43#true} assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647; {43#true} is VALID [2020-07-18 06:40:14,766 INFO L280 TraceCheckUtils]: 11: Hoare triple {43#true} ~z~0 := #t~nondet0; {43#true} is VALID [2020-07-18 06:40:14,766 INFO L280 TraceCheckUtils]: 12: Hoare triple {43#true} havoc #t~nondet0; {43#true} is VALID [2020-07-18 06:40:14,766 INFO L280 TraceCheckUtils]: 13: Hoare triple {43#true} assume -2147483648 <= #t~nondet1 && #t~nondet1 <= 2147483647; {43#true} is VALID [2020-07-18 06:40:14,767 INFO L280 TraceCheckUtils]: 14: Hoare triple {43#true} ~a~0 := #t~nondet1; {43#true} is VALID [2020-07-18 06:40:14,767 INFO L280 TraceCheckUtils]: 15: Hoare triple {43#true} havoc #t~nondet1; {43#true} is VALID [2020-07-18 06:40:14,768 INFO L280 TraceCheckUtils]: 16: Hoare triple {43#true} assume -2147483648 <= #t~nondet2 && #t~nondet2 <= 2147483647; {43#true} is VALID [2020-07-18 06:40:14,768 INFO L280 TraceCheckUtils]: 17: Hoare triple {43#true} ~k~0 := #t~nondet2; {43#true} is VALID [2020-07-18 06:40:14,768 INFO L280 TraceCheckUtils]: 18: Hoare triple {43#true} havoc #t~nondet2; {43#true} is VALID [2020-07-18 06:40:14,769 INFO L280 TraceCheckUtils]: 19: Hoare triple {43#true} ~x~0 := ~a~0; {43#true} is VALID [2020-07-18 06:40:14,769 INFO L280 TraceCheckUtils]: 20: Hoare triple {43#true} ~y~0 := 1; {43#true} is VALID [2020-07-18 06:40:14,769 INFO L280 TraceCheckUtils]: 21: Hoare triple {43#true} ~c~0 := 1; {43#true} is VALID [2020-07-18 06:40:14,771 INFO L280 TraceCheckUtils]: 22: Hoare triple {43#true} assume !true; {44#false} is VALID [2020-07-18 06:40:14,771 INFO L263 TraceCheckUtils]: 23: Hoare triple {44#false} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~a~0 * ~z~0 * ~y~0 then 1 else 0)); {44#false} is VALID [2020-07-18 06:40:14,772 INFO L280 TraceCheckUtils]: 24: Hoare triple {44#false} ~cond := #in~cond; {44#false} is VALID [2020-07-18 06:40:14,772 INFO L280 TraceCheckUtils]: 25: Hoare triple {44#false} assume 0 == ~cond; {44#false} is VALID [2020-07-18 06:40:14,773 INFO L280 TraceCheckUtils]: 26: Hoare triple {44#false} assume !false; {44#false} is VALID [2020-07-18 06:40:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-18 06:40:14,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059827921] [2020-07-18 06:40:14,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-18 06:40:14,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-18 06:40:14,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709616101] [2020-07-18 06:40:14,787 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2020-07-18 06:40:14,790 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-18 06:40:14,794 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states. [2020-07-18 06:40:14,874 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 27 edges. 27 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:40:14,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-18 06:40:14,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-18 06:40:14,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-18 06:40:14,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-18 06:40:14,887 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-07-18 06:40:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:40:15,020 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-07-18 06:40:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-18 06:40:15,021 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2020-07-18 06:40:15,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-18 06:40:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-18 06:40:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 68 transitions. [2020-07-18 06:40:15,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-18 06:40:15,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 68 transitions. [2020-07-18 06:40:15,039 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 68 transitions. [2020-07-18 06:40:15,142 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 68 edges. 68 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:40:15,155 INFO L225 Difference]: With dead ends: 58 [2020-07-18 06:40:15,155 INFO L226 Difference]: Without dead ends: 35 [2020-07-18 06:40:15,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-18 06:40:15,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-18 06:40:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-18 06:40:15,218 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-18 06:40:15,218 INFO L82 GeneralOperation]: Start isEquivalent. First operand 35 states. Second operand 35 states. [2020-07-18 06:40:15,219 INFO L74 IsIncluded]: Start isIncluded. First operand 35 states. Second operand 35 states. [2020-07-18 06:40:15,219 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 35 states. [2020-07-18 06:40:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:40:15,226 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-07-18 06:40:15,226 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-07-18 06:40:15,227 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 06:40:15,228 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 06:40:15,228 INFO L74 IsIncluded]: Start isIncluded. First operand 35 states. Second operand 35 states. [2020-07-18 06:40:15,228 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 35 states. [2020-07-18 06:40:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:40:15,233 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-07-18 06:40:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-07-18 06:40:15,234 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 06:40:15,235 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 06:40:15,235 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-18 06:40:15,235 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-18 06:40:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-18 06:40:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-07-18 06:40:15,241 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 27 [2020-07-18 06:40:15,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-18 06:40:15,241 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-07-18 06:40:15,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-18 06:40:15,242 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 35 states and 36 transitions. [2020-07-18 06:40:15,292 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 36 edges. 36 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:40:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-07-18 06:40:15,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-18 06:40:15,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 06:40:15,294 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] [2020-07-18 06:40:15,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-18 06:40:15,295 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 06:40:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 06:40:15,295 INFO L82 PathProgramCache]: Analyzing trace with hash 703427313, now seen corresponding path program 1 times [2020-07-18 06:40:15,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 06:40:15,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510680482] [2020-07-18 06:40:15,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 06:40:15,308 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-18 06:40:15,308 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-07-18 06:40:15,309 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-18 06:40:15,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-18 06:40:15,327 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2020-07-18 06:40:15,327 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-18 06:40:15,327 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-18 06:40:15,327 WARN L170 areAnnotationChecker]: assume_abort_if_notENTRY has no Hoare annotation [2020-07-18 06:40:15,328 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2020-07-18 06:40:15,328 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2020-07-18 06:40:15,328 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-18 06:40:15,328 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-18 06:40:15,328 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-18 06:40:15,329 WARN L170 areAnnotationChecker]: L10 has no Hoare annotation [2020-07-18 06:40:15,329 WARN L170 areAnnotationChecker]: L10 has no Hoare annotation [2020-07-18 06:40:15,329 WARN L170 areAnnotationChecker]: L20 has no Hoare annotation [2020-07-18 06:40:15,329 WARN L170 areAnnotationChecker]: L13 has no Hoare annotation [2020-07-18 06:40:15,329 WARN L170 areAnnotationChecker]: L13 has no Hoare annotation [2020-07-18 06:40:15,329 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-18 06:40:15,330 WARN L170 areAnnotationChecker]: L10-1 has no Hoare annotation [2020-07-18 06:40:15,330 WARN L170 areAnnotationChecker]: L10-3 has no Hoare annotation [2020-07-18 06:40:15,330 WARN L170 areAnnotationChecker]: L20-1 has no Hoare annotation [2020-07-18 06:40:15,330 WARN L170 areAnnotationChecker]: L14 has no Hoare annotation [2020-07-18 06:40:15,330 WARN L170 areAnnotationChecker]: L14 has no Hoare annotation [2020-07-18 06:40:15,330 WARN L170 areAnnotationChecker]: L13-2 has no Hoare annotation [2020-07-18 06:40:15,331 WARN L170 areAnnotationChecker]: L21 has no Hoare annotation [2020-07-18 06:40:15,331 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-18 06:40:15,331 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-18 06:40:15,331 WARN L170 areAnnotationChecker]: L21-1 has no Hoare annotation [2020-07-18 06:40:15,331 WARN L170 areAnnotationChecker]: L31-1 has no Hoare annotation [2020-07-18 06:40:15,331 WARN L170 areAnnotationChecker]: L31-1 has no Hoare annotation [2020-07-18 06:40:15,332 WARN L170 areAnnotationChecker]: L40 has no Hoare annotation [2020-07-18 06:40:15,332 WARN L170 areAnnotationChecker]: L21-2 has no Hoare annotation [2020-07-18 06:40:15,332 WARN L170 areAnnotationChecker]: L30-3 has no Hoare annotation [2020-07-18 06:40:15,332 WARN L170 areAnnotationChecker]: L30-3 has no Hoare annotation [2020-07-18 06:40:15,332 WARN L170 areAnnotationChecker]: L36 has no Hoare annotation [2020-07-18 06:40:15,332 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-18 06:40:15,333 WARN L170 areAnnotationChecker]: L22 has no Hoare annotation [2020-07-18 06:40:15,333 WARN L170 areAnnotationChecker]: L37 has no Hoare annotation [2020-07-18 06:40:15,333 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-18 06:40:15,333 WARN L170 areAnnotationChecker]: L22-1 has no Hoare annotation [2020-07-18 06:40:15,333 WARN L170 areAnnotationChecker]: L38 has no Hoare annotation [2020-07-18 06:40:15,333 WARN L170 areAnnotationChecker]: L22-2 has no Hoare annotation [2020-07-18 06:40:15,334 WARN L170 areAnnotationChecker]: L30-2 has no Hoare annotation [2020-07-18 06:40:15,334 WARN L170 areAnnotationChecker]: L30-2 has no Hoare annotation [2020-07-18 06:40:15,334 WARN L170 areAnnotationChecker]: L30-2 has no Hoare annotation [2020-07-18 06:40:15,334 WARN L170 areAnnotationChecker]: L23 has no Hoare annotation [2020-07-18 06:40:15,335 WARN L170 areAnnotationChecker]: L31 has no Hoare annotation [2020-07-18 06:40:15,335 WARN L170 areAnnotationChecker]: L31 has no Hoare annotation [2020-07-18 06:40:15,335 WARN L170 areAnnotationChecker]: L23-1 has no Hoare annotation [2020-07-18 06:40:15,335 WARN L170 areAnnotationChecker]: L23-2 has no Hoare annotation [2020-07-18 06:40:15,335 WARN L170 areAnnotationChecker]: L24 has no Hoare annotation [2020-07-18 06:40:15,335 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-18 06:40:15,336 WARN L170 areAnnotationChecker]: L24-2 has no Hoare annotation [2020-07-18 06:40:15,336 WARN L170 areAnnotationChecker]: L26 has no Hoare annotation [2020-07-18 06:40:15,336 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-18 06:40:15,336 WARN L170 areAnnotationChecker]: L28 has no Hoare annotation [2020-07-18 06:40:15,337 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-18 06:40:15,340 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-18 06:40:15,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.07 06:40:15 BoogieIcfgContainer [2020-07-18 06:40:15,341 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-18 06:40:15,344 INFO L168 Benchmark]: Toolchain (without parser) took 1597.90 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 102.9 MB in the beginning and 90.5 MB in the end (delta: 12.3 MB). Peak memory consumption was 76.8 MB. Max. memory is 7.1 GB. [2020-07-18 06:40:15,345 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-18 06:40:15,346 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.22 ms. Allocated memory is still 137.4 MB. Free memory was 102.4 MB in the beginning and 92.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-18 06:40:15,347 INFO L168 Benchmark]: Boogie Preprocessor took 112.86 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 92.6 MB in the beginning and 181.1 MB in the end (delta: -88.5 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2020-07-18 06:40:15,348 INFO L168 Benchmark]: RCFGBuilder took 360.51 ms. Allocated memory is still 201.9 MB. Free memory was 181.1 MB in the beginning and 160.9 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-07-18 06:40:15,349 INFO L168 Benchmark]: TraceAbstraction took 848.48 ms. Allocated memory is still 201.9 MB. Free memory was 160.2 MB in the beginning and 90.5 MB in the end (delta: 69.7 MB). Peak memory consumption was 69.7 MB. Max. memory is 7.1 GB. [2020-07-18 06:40:15,353 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.22 ms. Allocated memory is still 137.4 MB. Free memory was 102.4 MB in the beginning and 92.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.86 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 92.6 MB in the beginning and 181.1 MB in the end (delta: -88.5 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 360.51 ms. Allocated memory is still 201.9 MB. Free memory was 181.1 MB in the beginning and 160.9 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 848.48 ms. Allocated memory is still 201.9 MB. Free memory was 160.2 MB in the beginning and 90.5 MB in the end (delta: 69.7 MB). Peak memory consumption was 69.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: 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: [L20] int z, a, k; [L21] int x, y, c; [L22] z = __VERIFIER_nondet_int() [L23] a = __VERIFIER_nondet_int() [L24] k = __VERIFIER_nondet_int() [L26] x = a [L27] y = 1 [L28] c = 1 [L30] COND TRUE 1 [L31] CALL __VERIFIER_assert(z*x - x + a - a*z*y == 0) [L13] COND TRUE !(cond) [L15] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, 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, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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, 0.0s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 676 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...