/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:13:46,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:13:46,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:13:46,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:13:46,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:13:46,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:13:46,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:13:46,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:13:46,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:13:46,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:13:46,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:13:46,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:13:46,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:13:46,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:13:46,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:13:46,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:13:46,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:13:46,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:13:46,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:13:46,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:13:46,851 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 16:13:46,883 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:13:46,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:13:46,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:13:46,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:13:46,886 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:13:46,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:13:46,886 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:13:46,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:13:46,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:13:46,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:13:46,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:13:46,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:13:46,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:13:46,887 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:13:46,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:13:46,887 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:13:46,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:13:46,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:13:46,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:13:46,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:13:46,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:13:46,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:13:46,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:13:46,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:13:46,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:13:46,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:13:46,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:13:46,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:13:46,889 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:13:47,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:13:47,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:13:47,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:13:47,126 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:13:47,127 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:13:47,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound2.c [2021-05-02 16:13:47,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aa5b3137/0187ea9d78bd401fa26872c8d35c756a/FLAG5e63ba017 [2021-05-02 16:13:47,588 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:13:47,590 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound2.c [2021-05-02 16:13:47,595 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aa5b3137/0187ea9d78bd401fa26872c8d35c756a/FLAG5e63ba017 [2021-05-02 16:13:48,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aa5b3137/0187ea9d78bd401fa26872c8d35c756a [2021-05-02 16:13:48,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:13:48,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:13:48,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:13:48,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:13:48,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:13:48,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e791524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48, skipping insertion in model container [2021-05-02 16:13:48,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:13:48,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:13:48,134 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound2.c[573,586] [2021-05-02 16:13:48,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:13:48,146 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:13:48,167 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound2.c[573,586] [2021-05-02 16:13:48,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:13:48,194 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:13:48,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48 WrapperNode [2021-05-02 16:13:48,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:13:48,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:13:48,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:13:48,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:13:48,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:13:48,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:13:48,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:13:48,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:13:48,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (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 [2021-05-02 16:13:48,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:13:48,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:13:48,283 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:13:48,283 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:13:48,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:13:48,284 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:13:48,284 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:13:48,284 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:13:48,284 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:13:48,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:13:48,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 16:13:48,285 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:13:48,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:13:48,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:13:48,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:13:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:13:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:13:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:13:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:13:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:13:48,502 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:13:48,502 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:13:48,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:13:48 BoogieIcfgContainer [2021-05-02 16:13:48,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:13:48,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:13:48,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:13:48,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:13:48,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:13:48" (1/3) ... [2021-05-02 16:13:48,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1d5de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:13:48, skipping insertion in model container [2021-05-02 16:13:48,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (2/3) ... [2021-05-02 16:13:48,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1d5de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:13:48, skipping insertion in model container [2021-05-02 16:13:48,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:13:48" (3/3) ... [2021-05-02 16:13:48,509 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound2.c [2021-05-02 16:13:48,513 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:13:48,515 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:13:48,526 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:13:48,550 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:13:48,551 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:13:48,551 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:13:48,551 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:13:48,551 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:13:48,551 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:13:48,551 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:13:48,551 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:13:48,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:13:48,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 16:13:48,570 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:48,571 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:48,571 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:48,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:48,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2021-05-02 16:13:48,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:48,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549953604] [2021-05-02 16:13:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:48,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:13:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:48,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:13:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:48,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 16:13:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:48,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:48,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549953604] [2021-05-02 16:13:48,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549953604] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:13:48,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:13:48,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:13:48,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680043796] [2021-05-02 16:13:48,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:13:48,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:48,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:13:48,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:13:48,765 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:13:48,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:48,839 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-05-02 16:13:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:13:48,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 16:13:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:48,846 INFO L225 Difference]: With dead ends: 54 [2021-05-02 16:13:48,846 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 16:13:48,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:13:48,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 16:13:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 16:13:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:13:48,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 16:13:48,883 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 16:13:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:48,883 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 16:13:48,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:13:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 16:13:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 16:13:48,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:48,885 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:48,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:13:48,885 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:48,886 INFO L82 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2021-05-02 16:13:48,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:48,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92062890] [2021-05-02 16:13:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:48,898 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:48,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79134453] [2021-05-02 16:13:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:48,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:13:48,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:49,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:49,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:49,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92062890] [2021-05-02 16:13:49,061 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:49,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79134453] [2021-05-02 16:13:49,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79134453] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:13:49,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:13:49,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:13:49,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176172571] [2021-05-02 16:13:49,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:13:49,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:49,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:13:49,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:13:49,063 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:13:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:49,074 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 16:13:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:13:49,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 16:13:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:49,076 INFO L225 Difference]: With dead ends: 34 [2021-05-02 16:13:49,076 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 16:13:49,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:13:49,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 16:13:49,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 16:13:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:13:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 16:13:49,081 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 16:13:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:49,082 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 16:13:49,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:13:49,082 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 16:13:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 16:13:49,083 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:49,083 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:49,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:13:49,289 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:49,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:49,290 INFO L82 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2021-05-02 16:13:49,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:49,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016139874] [2021-05-02 16:13:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:49,301 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:49,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198736486] [2021-05-02 16:13:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:49,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 16:13:49,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:49,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:13:49,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:49,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016139874] [2021-05-02 16:13:49,446 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:49,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198736486] [2021-05-02 16:13:49,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198736486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:49,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:49,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:13:49,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443543214] [2021-05-02 16:13:49,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:13:49,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:49,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:13:49,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:13:49,448 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:13:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:49,548 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-02 16:13:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:13:49,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 16:13:49,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:49,549 INFO L225 Difference]: With dead ends: 37 [2021-05-02 16:13:49,549 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 16:13:49,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:13:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 16:13:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 16:13:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:13:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 16:13:49,564 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 16:13:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:49,564 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 16:13:49,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:13:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 16:13:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 16:13:49,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:49,565 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:49,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:49,781 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:49,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:49,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2021-05-02 16:13:49,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:49,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805519120] [2021-05-02 16:13:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:49,794 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:49,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508011522] [2021-05-02 16:13:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:49,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:13:49,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:49,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:13:50,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:50,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805519120] [2021-05-02 16:13:50,015 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:50,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508011522] [2021-05-02 16:13:50,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508011522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:50,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:50,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:13:50,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670001717] [2021-05-02 16:13:50,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:13:50,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:50,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:13:50,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:13:50,016 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:13:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:50,146 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 16:13:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:13:50,146 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-05-02 16:13:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:50,147 INFO L225 Difference]: With dead ends: 39 [2021-05-02 16:13:50,147 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 16:13:50,148 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:13:50,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 16:13:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-05-02 16:13:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:13:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-02 16:13:50,152 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-02 16:13:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:50,152 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-02 16:13:50,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:13:50,152 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-02 16:13:50,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 16:13:50,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:50,153 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:50,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:50,354 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:50,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:50,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2021-05-02 16:13:50,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:50,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103796253] [2021-05-02 16:13:50,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:50,362 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:50,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586347624] [2021-05-02 16:13:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:50,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:13:50,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:50,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:50,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:50,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103796253] [2021-05-02 16:13:50,483 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:50,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586347624] [2021-05-02 16:13:50,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586347624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:50,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:50,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:13:50,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020124591] [2021-05-02 16:13:50,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:13:50,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:50,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:13:50,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:13:50,484 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:13:50,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:50,523 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-05-02 16:13:50,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:13:50,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 16:13:50,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:50,524 INFO L225 Difference]: With dead ends: 43 [2021-05-02 16:13:50,524 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 16:13:50,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:13:50,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 16:13:50,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 16:13:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:13:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-02 16:13:50,529 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-02 16:13:50,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:50,529 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-02 16:13:50,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:13:50,529 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-02 16:13:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 16:13:50,530 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:50,530 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:50,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:50,745 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:50,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 2 times [2021-05-02 16:13:50,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:50,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541552369] [2021-05-02 16:13:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:50,753 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:50,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199886173] [2021-05-02 16:13:50,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:50,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:13:50,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 16:13:50,808 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 16:13:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 16:13:50,828 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 16:13:50,888 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 16:13:50,888 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 16:13:51,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 16:13:51,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 04:13:51 BoogieIcfgContainer [2021-05-02 16:13:51,132 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 16:13:51,132 INFO L168 Benchmark]: Toolchain (without parser) took 3092.85 ms. Allocated memory was 199.2 MB in the beginning and 239.1 MB in the end (delta: 39.8 MB). Free memory was 163.0 MB in the beginning and 216.4 MB in the end (delta: -53.4 MB). Peak memory consumption was 97.5 MB. Max. memory is 8.0 GB. [2021-05-02 16:13:51,132 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 199.2 MB. Free memory is still 179.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 16:13:51,132 INFO L168 Benchmark]: CACSL2BoogieTranslator took 154.53 ms. Allocated memory is still 199.2 MB. Free memory was 162.7 MB in the beginning and 181.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2021-05-02 16:13:51,133 INFO L168 Benchmark]: Boogie Preprocessor took 32.33 ms. Allocated memory is still 199.2 MB. Free memory was 181.8 MB in the beginning and 180.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 16:13:51,133 INFO L168 Benchmark]: RCFGBuilder took 274.31 ms. Allocated memory is still 199.2 MB. Free memory was 180.2 MB in the beginning and 164.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 16:13:51,133 INFO L168 Benchmark]: TraceAbstraction took 2627.33 ms. Allocated memory was 199.2 MB in the beginning and 239.1 MB in the end (delta: 39.8 MB). Free memory was 164.5 MB in the beginning and 216.4 MB in the end (delta: -51.9 MB). Peak memory consumption was 99.4 MB. Max. memory is 8.0 GB. [2021-05-02 16:13:51,133 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 199.2 MB. Free memory is still 179.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 154.53 ms. Allocated memory is still 199.2 MB. Free memory was 162.7 MB in the beginning and 181.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.33 ms. Allocated memory is still 199.2 MB. Free memory was 181.8 MB in the beginning and 180.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 274.31 ms. Allocated memory is still 199.2 MB. Free memory was 180.2 MB in the beginning and 164.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2627.33 ms. Allocated memory was 199.2 MB in the beginning and 239.1 MB in the end (delta: 39.8 MB). Free memory was 164.5 MB in the beginning and 216.4 MB in the end (delta: -51.9 MB). Peak memory consumption was 99.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=10, counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L29] RET assume_abort_if_not(x1 >= 0) VAL [\old(counter)=0, counter=0, x1=3, x2=1] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L30] RET assume_abort_if_not(x2 != 0) VAL [\old(counter)=0, counter=0, x1=3, x2=1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [\old(counter)=0, counter=0, x1=3, x2=1, y1=0, y2=0, y3=3] [L36] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, x1=3, x2=1, y1=0, y2=0, y3=3] [L36] COND TRUE counter++<2 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=1, x1=3, x2=1, y1=0, y2=0, y3=3] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=1, x1=3, x2=1, y1=0, y2=0, y3=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=1, x1=3, x2=1, y1=1, y2=0, y3=2] [L36] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, x1=3, x2=1, y1=1, y2=0, y3=2] [L36] COND TRUE counter++<2 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=2, x1=3, x2=1, y1=1, y2=0, y3=2] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=2, x1=3, x2=1, y1=1, y2=0, y3=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=2, x1=3, x2=1, y1=2, y2=0, y3=1] [L36] EXPR counter++ VAL [\old(counter)=0, counter=3, counter++=2, x1=3, x2=1, y1=2, y2=0, y3=1] [L36] COND FALSE !(counter++<2) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L18] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2555.4ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 11.7ms, AutomataDifference: 379.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 120 SDtfs, 57 SDslu, 319 SDs, 0 SdLazy, 220 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 184.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 231.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=5, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 52.3ms AutomataMinimizationTime, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 51.7ms SsaConstructionTime, 120.2ms SatisfiabilityAnalysisTime, 541.8ms InterpolantComputationTime, 170 NumberOfCodeBlocks, 170 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 361 SizeOfPredicates, 9 NumberOfNonLiveVariables, 542 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 17/26 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 proved your program to be incorrect! Received shutdown request...