/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/hard-u_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:15:04,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:15:04,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:15:04,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:15:04,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:15:04,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:15:04,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:15:04,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:15:04,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:15:04,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:15:04,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:15:04,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:15:04,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:15:04,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:15:04,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:15:04,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:15:04,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:15:04,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:15:04,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:15:04,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:15:04,327 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 [2021-05-06 03:15:04,342 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:15:04,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:15:04,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:15:04,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:15:04,344 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:15:04,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:15:04,344 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:15:04,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:15:04,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:15:04,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:15:04,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:15:04,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:15:04,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:15:04,345 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:15:04,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:15:04,345 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:15:04,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:15:04,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:15:04,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:15:04,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:15:04,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:15:04,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:15:04,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:15:04,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:15:04,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:15:04,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:15:04,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:15:04,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:15:04,347 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:15:04,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:15:04,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:15:04,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:15:04,645 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:15:04,645 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:15:04,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound1.c [2021-05-06 03:15:04,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ec41122e/112fd85e89474006bf180c70666267e6/FLAG448edd1f3 [2021-05-06 03:15:05,057 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:15:05,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound1.c [2021-05-06 03:15:05,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ec41122e/112fd85e89474006bf180c70666267e6/FLAG448edd1f3 [2021-05-06 03:15:05,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ec41122e/112fd85e89474006bf180c70666267e6 [2021-05-06 03:15:05,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:15:05,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:15:05,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:15:05,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:15:05,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:15:05,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:15:05" (1/1) ... [2021-05-06 03:15:05,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f8313b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:05, skipping insertion in model container [2021-05-06 03:15:05,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:15:05" (1/1) ... [2021-05-06 03:15:05,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:15:05,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:15:05,581 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/hard-u_unwindbound1.c[545,558] [2021-05-06 03:15:05,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:15:05,603 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:15:05,611 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/hard-u_unwindbound1.c[545,558] [2021-05-06 03:15:05,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:15:05,644 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:15:05,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:05 WrapperNode [2021-05-06 03:15:05,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:15:05,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:15:05,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:15:05,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:15:05,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:05" (1/1) ... [2021-05-06 03:15:05,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:05" (1/1) ... [2021-05-06 03:15:05,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:05" (1/1) ... [2021-05-06 03:15:05,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:05" (1/1) ... [2021-05-06 03:15:05,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:05" (1/1) ... [2021-05-06 03:15:05,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:05" (1/1) ... [2021-05-06 03:15:05,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:05" (1/1) ... [2021-05-06 03:15:05,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:15:05,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:15:05,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:15:05,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:15:05,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:05" (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 [2021-05-06 03:15:05,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:15:05,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:15:05,749 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:15:05,752 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:15:05,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:15:05,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:15:05,753 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:15:05,754 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:15:05,754 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:15:05,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:15:05,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:15:05,754 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:15:05,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:15:05,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:15:05,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:15:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:15:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:15:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:15:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:15:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:15:06,022 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:15:06,023 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:15:06,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:15:06 BoogieIcfgContainer [2021-05-06 03:15:06,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:15:06,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:15:06,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:15:06,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:15:06,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:15:05" (1/3) ... [2021-05-06 03:15:06,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374a76fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:15:06, skipping insertion in model container [2021-05-06 03:15:06,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:05" (2/3) ... [2021-05-06 03:15:06,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374a76fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:15:06, skipping insertion in model container [2021-05-06 03:15:06,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:15:06" (3/3) ... [2021-05-06 03:15:06,033 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound1.c [2021-05-06 03:15:06,037 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:15:06,039 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:15:06,049 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:15:06,062 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:15:06,062 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:15:06,062 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:15:06,062 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:15:06,062 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:15:06,062 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:15:06,062 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:15:06,062 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:15:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:15:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 03:15:06,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:06,075 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:06,075 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:06,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:06,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-06 03:15:06,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:06,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97759269] [2021-05-06 03:15:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:06,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:15:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:06,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:15:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:15:06,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:06,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97759269] [2021-05-06 03:15:06,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97759269] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:15:06,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:15:06,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:15:06,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783135518] [2021-05-06 03:15:06,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:15:06,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:06,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:15:06,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:15:06,223 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:15:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:06,315 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-06 03:15:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:15:06,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 03:15:06,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:06,326 INFO L225 Difference]: With dead ends: 66 [2021-05-06 03:15:06,326 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:15:06,328 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:15:06,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:15:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 03:15:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:15:06,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 03:15:06,369 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 03:15:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:06,370 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 03:15:06,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:15:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 03:15:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 03:15:06,371 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:06,371 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:06,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:15:06,372 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:06,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:06,373 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-06 03:15:06,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:06,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372813485] [2021-05-06 03:15:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:06,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:15:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:06,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:15:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:15:06,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:06,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372813485] [2021-05-06 03:15:06,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372813485] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:15:06,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:15:06,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:15:06,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190067454] [2021-05-06 03:15:06,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:15:06,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:06,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:15:06,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:15:06,545 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:15:06,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:06,800 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-06 03:15:06,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:15:06,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 03:15:06,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:06,803 INFO L225 Difference]: With dead ends: 47 [2021-05-06 03:15:06,803 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 03:15:06,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:15:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 03:15:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 03:15:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:15:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 03:15:06,822 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 03:15:06,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:06,823 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 03:15:06,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:15:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 03:15:06,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 03:15:06,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:06,824 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:06,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:15:06,825 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:06,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:06,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-06 03:15:06,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:06,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702880211] [2021-05-06 03:15:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:06,847 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:06,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876986552] [2021-05-06 03:15:06,847 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 [2021-05-06 03:15:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 03:15:06,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:06,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:15:07,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:07,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702880211] [2021-05-06 03:15:07,016 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:07,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876986552] [2021-05-06 03:15:07,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876986552] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:15:07,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:15:07,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 03:15:07,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574411244] [2021-05-06 03:15:07,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 03:15:07,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:07,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 03:15:07,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:15:07,018 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:15:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:07,035 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-05-06 03:15:07,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 03:15:07,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 03:15:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:07,036 INFO L225 Difference]: With dead ends: 52 [2021-05-06 03:15:07,036 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 03:15:07,037 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:15:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 03:15:07,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 03:15:07,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:15:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 03:15:07,041 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 03:15:07,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:07,041 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 03:15:07,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:15:07,041 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 03:15:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 03:15:07,042 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:07,042 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:07,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 03:15:07,242 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:07,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:07,243 INFO L82 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2021-05-06 03:15:07,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:07,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390150316] [2021-05-06 03:15:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:07,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:15:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:07,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:15:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:07,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 03:15:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:15:07,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:07,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390150316] [2021-05-06 03:15:07,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390150316] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:15:07,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:15:07,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:15:07,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42322350] [2021-05-06 03:15:07,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:15:07,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:07,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:15:07,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:15:07,362 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:15:07,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:07,595 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-06 03:15:07,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:15:07,596 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 03:15:07,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:07,598 INFO L225 Difference]: With dead ends: 52 [2021-05-06 03:15:07,598 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 03:15:07,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:15:07,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 03:15:07,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 03:15:07,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:15:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 03:15:07,609 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 03:15:07,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:07,609 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 03:15:07,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:15:07,609 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 03:15:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:15:07,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:07,611 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:07,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 03:15:07,611 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:07,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2021-05-06 03:15:07,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:07,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751170959] [2021-05-06 03:15:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:07,632 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:07,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920845452] [2021-05-06 03:15:07,632 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 [2021-05-06 03:15:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:07,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:15:07,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:07,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 03:15:07,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:07,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751170959] [2021-05-06 03:15:07,786 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:07,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920845452] [2021-05-06 03:15:07,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920845452] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:15:07,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:15:07,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:15:07,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378340489] [2021-05-06 03:15:07,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:15:07,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:07,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:15:07,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:15:07,787 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:15:10,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:10,054 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-05-06 03:15:10,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:15:10,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:15:10,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:10,055 INFO L225 Difference]: With dead ends: 59 [2021-05-06 03:15:10,056 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 03:15:10,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:15:10,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 03:15:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 03:15:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:15:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2021-05-06 03:15:10,061 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2021-05-06 03:15:10,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:10,061 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2021-05-06 03:15:10,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:15:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2021-05-06 03:15:10,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:15:10,062 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:10,062 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2021-05-06 03:15:10,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:15:10,269 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:10,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2021-05-06 03:15:10,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:10,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981154441] [2021-05-06 03:15:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:10,276 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:10,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634546311] [2021-05-06 03:15:10,276 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 [2021-05-06 03:15:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:10,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 03:15:10,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:10,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:15:10,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:10,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981154441] [2021-05-06 03:15:10,424 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:10,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634546311] [2021-05-06 03:15:10,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634546311] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:15:10,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:15:10,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:15:10,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284186668] [2021-05-06 03:15:10,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:15:10,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:10,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:15:10,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:15:10,425 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:15:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:10,537 INFO L93 Difference]: Finished difference Result 77 states and 102 transitions. [2021-05-06 03:15:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:15:10,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 03:15:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:10,538 INFO L225 Difference]: With dead ends: 77 [2021-05-06 03:15:10,538 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 03:15:10,539 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:15:10,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 03:15:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-05-06 03:15:10,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.25) internal successors, (50), 42 states have internal predecessors, (50), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 03:15:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2021-05-06 03:15:10,545 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 36 [2021-05-06 03:15:10,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:10,545 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2021-05-06 03:15:10,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:15:10,545 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2021-05-06 03:15:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 03:15:10,546 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:10,546 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:10,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:15:10,767 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:10,767 INFO L82 PathProgramCache]: Analyzing trace with hash 817878903, now seen corresponding path program 1 times [2021-05-06 03:15:10,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:10,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879949259] [2021-05-06 03:15:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:10,774 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:10,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442718115] [2021-05-06 03:15:10,774 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 [2021-05-06 03:15:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 03:15:10,827 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 03:15:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 03:15:10,844 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 03:15:10,895 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 03:15:10,895 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 03:15:11,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:15:11,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 03:15:11 BoogieIcfgContainer [2021-05-06 03:15:11,123 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 03:15:11,123 INFO L168 Benchmark]: Toolchain (without parser) took 5656.28 ms. Allocated memory was 184.5 MB in the beginning and 238.0 MB in the end (delta: 53.5 MB). Free memory was 149.3 MB in the beginning and 109.0 MB in the end (delta: 40.3 MB). Peak memory consumption was 94.5 MB. Max. memory is 8.0 GB. [2021-05-06 03:15:11,124 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 184.5 MB. Free memory was 165.9 MB in the beginning and 165.8 MB in the end (delta: 137.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 03:15:11,124 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.88 ms. Allocated memory is still 184.5 MB. Free memory was 149.1 MB in the beginning and 167.1 MB in the end (delta: -17.9 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. [2021-05-06 03:15:11,124 INFO L168 Benchmark]: Boogie Preprocessor took 34.80 ms. Allocated memory is still 184.5 MB. Free memory was 167.1 MB in the beginning and 165.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 03:15:11,124 INFO L168 Benchmark]: RCFGBuilder took 336.09 ms. Allocated memory is still 184.5 MB. Free memory was 165.3 MB in the beginning and 149.1 MB in the end (delta: 16.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 03:15:11,124 INFO L168 Benchmark]: TraceAbstraction took 5096.23 ms. Allocated memory was 184.5 MB in the beginning and 238.0 MB in the end (delta: 53.5 MB). Free memory was 148.5 MB in the beginning and 109.0 MB in the end (delta: 39.5 MB). Peak memory consumption was 93.5 MB. Max. memory is 8.0 GB. [2021-05-06 03:15:11,124 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 184.5 MB. Free memory was 165.9 MB in the beginning and 165.8 MB in the end (delta: 137.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 170.88 ms. Allocated memory is still 184.5 MB. Free memory was 149.1 MB in the beginning and 167.1 MB in the end (delta: -17.9 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.80 ms. Allocated memory is still 184.5 MB. Free memory was 167.1 MB in the beginning and 165.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 336.09 ms. Allocated memory is still 184.5 MB. Free memory was 165.3 MB in the beginning and 149.1 MB in the end (delta: 16.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5096.23 ms. Allocated memory was 184.5 MB in the beginning and 238.0 MB in the end (delta: 53.5 MB). Free memory was 148.5 MB in the beginning and 109.0 MB in the end (delta: 39.5 MB). Peak memory consumption was 93.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: 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)=16, counter=0] [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_unsigned_int() [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L12] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(B >= 1) VAL [\old(counter)=0, B=4294967297, counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [\old(counter)=0, A=-4294967295, B=4294967297, counter=0, d=4294967297, p=1, q=0, r=-4294967295] [L35] EXPR counter++ VAL [\old(counter)=0, A=-4294967295, B=4294967297, counter=1, counter++=0, d=4294967297, p=1, q=0, r=-4294967295] [L35] COND TRUE counter++<1 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=-4294967295, B=4294967297, counter=1, d=4294967297, p=1, q=0, r=-4294967295] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=-4294967295, B=4294967297, counter=1, d=4294967297, p=1, q=0, r=-4294967295] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=-4294967295, B=4294967297, counter=1, d=4294967297, p=1, q=0, r=-4294967295] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=-4294967295, B=4294967297, counter=1, d=8589934594, p=2, q=0, r=-4294967295] [L35] EXPR counter++ VAL [\old(counter)=0, A=-4294967295, B=4294967297, counter=2, counter++=1, d=8589934594, p=2, q=0, r=-4294967295] [L35] COND FALSE !(counter++<1) [L45] EXPR counter++ VAL [\old(counter)=0, A=-4294967295, B=4294967297, counter=3, counter++=2, d=8589934594, p=2, q=0, r=-4294967295] [L45] COND FALSE !(counter++<1) [L59] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L59] RET __VERIFIER_assert(A == d*q + r) VAL [\old(counter)=0, A=-4294967295, B=4294967297, counter=3, d=8589934594, p=2, q=0, r=-4294967295] [L60] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5035.6ms, OverallIterations: 7, TraceHistogramMax: 5, EmptinessCheckTime: 9.6ms, AutomataDifference: 3014.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 241 SDtfs, 88 SDslu, 452 SDs, 0 SdLazy, 297 SolverSat, 45 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2412.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 118 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 345.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=6, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 75.5ms AutomataMinimizationTime, 6 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 39.7ms SsaConstructionTime, 164.9ms SatisfiabilityAnalysisTime, 594.2ms InterpolantComputationTime, 186 NumberOfCodeBlocks, 186 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 137 ConstructedInterpolants, 0 QuantifiedInterpolants, 399 SizeOfPredicates, 4 NumberOfNonLiveVariables, 395 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 28/28 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...