/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_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:13:53,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:13:53,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:13:53,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:13:53,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:13:53,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:13:53,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:13:53,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:13:53,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:13:53,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:13:53,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:13:53,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:13:53,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:13:53,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:13:53,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:13:53,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:13:53,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:13:53,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:13:53,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:13:53,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:13:53,111 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 16:13:53,140 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:13:53,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:13:53,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:13:53,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:13:53,143 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:13:53,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:13:53,144 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:13:53,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:13:53,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:13:53,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:13:53,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:13:53,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:13:53,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:13:53,145 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:13:53,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:13:53,146 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:13:53,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:13:53,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:13:53,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:13:53,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:13:53,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:13:53,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:13:53,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:13:53,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:13:53,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:13:53,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:13:53,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:13:53,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:13:53,147 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:13:53,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:13:53,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:13:53,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:13:53,478 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:13:53,480 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:13:53,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-05-02 16:13:53,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcf7cdc67/3554fb8945a6460aaad707a6cf3acfaf/FLAGb012b6653 [2021-05-02 16:13:53,961 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:13:53,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-05-02 16:13:53,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcf7cdc67/3554fb8945a6460aaad707a6cf3acfaf/FLAGb012b6653 [2021-05-02 16:13:54,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcf7cdc67/3554fb8945a6460aaad707a6cf3acfaf [2021-05-02 16:13:54,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:13:54,014 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:13:54,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:13:54,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:13:54,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:13:54,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:13:54" (1/1) ... [2021-05-02 16:13:54,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@90a57d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:54, skipping insertion in model container [2021-05-02 16:13:54,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:13:54" (1/1) ... [2021-05-02 16:13:54,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:13:54,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:13:54,182 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_unwindbound5.c[573,586] [2021-05-02 16:13:54,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:13:54,212 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:13:54,233 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_unwindbound5.c[573,586] [2021-05-02 16:13:54,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:13:54,269 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:13:54,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:54 WrapperNode [2021-05-02 16:13:54,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:13:54,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:13:54,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:13:54,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:13:54,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:54" (1/1) ... [2021-05-02 16:13:54,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:54" (1/1) ... [2021-05-02 16:13:54,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:54" (1/1) ... [2021-05-02 16:13:54,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:54" (1/1) ... [2021-05-02 16:13:54,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:54" (1/1) ... [2021-05-02 16:13:54,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:54" (1/1) ... [2021-05-02 16:13:54,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:54" (1/1) ... [2021-05-02 16:13:54,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:13:54,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:13:54,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:13:54,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:13:54,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:54" (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 16:13:54,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:13:54,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:13:54,381 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:13:54,381 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:13:54,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:13:54,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:13:54,382 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:13:54,382 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:13:54,382 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:13:54,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:13:54,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 16:13:54,383 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:13:54,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:13:54,384 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:13:54,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:13:54,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:13:54,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:13:54,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:13:54,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:13:54,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:13:54,624 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:13:54,624 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:13:54,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:13:54 BoogieIcfgContainer [2021-05-02 16:13:54,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:13:54,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:13:54,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:13:54,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:13:54,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:13:54" (1/3) ... [2021-05-02 16:13:54,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609b8df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:13:54, skipping insertion in model container [2021-05-02 16:13:54,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:54" (2/3) ... [2021-05-02 16:13:54,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609b8df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:13:54, skipping insertion in model container [2021-05-02 16:13:54,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:13:54" (3/3) ... [2021-05-02 16:13:54,632 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound5.c [2021-05-02 16:13:54,636 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:13:54,639 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:13:54,653 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:13:54,680 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:13:54,680 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:13:54,680 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:13:54,681 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:13:54,681 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:13:54,682 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:13:54,682 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:13:54,682 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:13:54,716 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 16:13:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 16:13:54,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:54,721 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 16:13:54,721 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:54,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2021-05-02 16:13:54,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:54,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379354777] [2021-05-02 16:13:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:54,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:13:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:54,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:13:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:54,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 16:13:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:54,988 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 16:13:54,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:54,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379354777] [2021-05-02 16:13:54,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379354777] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:13:54,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:13:54,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:13:54,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759605292] [2021-05-02 16:13:54,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:13:54,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:55,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:13:55,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:13:55,010 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 16:13:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:55,108 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-05-02 16:13:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:13:55,110 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 16:13:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:55,116 INFO L225 Difference]: With dead ends: 54 [2021-05-02 16:13:55,116 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 16:13:55,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:13:55,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 16:13:55,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 16:13:55,158 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 16:13:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 16:13:55,160 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 16:13:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:55,161 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 16:13:55,161 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 16:13:55,162 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 16:13:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 16:13:55,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:55,163 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 16:13:55,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:13:55,163 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:55,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:55,165 INFO L82 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2021-05-02 16:13:55,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:55,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149051259] [2021-05-02 16:13:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:55,206 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:55,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797440696] [2021-05-02 16:13:55,207 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 16:13:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:55,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:13:55,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:55,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,444 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 16:13:55,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:55,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149051259] [2021-05-02 16:13:55,446 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:55,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797440696] [2021-05-02 16:13:55,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797440696] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:13:55,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:13:55,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:13:55,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20458581] [2021-05-02 16:13:55,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:13:55,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:55,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:13:55,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:13:55,451 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 16:13:55,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:55,467 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 16:13:55,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:13:55,468 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 16:13:55,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:55,469 INFO L225 Difference]: With dead ends: 34 [2021-05-02 16:13:55,469 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 16:13:55,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:13:55,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 16:13:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 16:13:55,475 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 16:13:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 16:13:55,476 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 16:13:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:55,477 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 16:13:55,477 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 16:13:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 16:13:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 16:13:55,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:55,478 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 16:13:55,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:13:55,701 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:55,702 INFO L82 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2021-05-02 16:13:55,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:55,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443809694] [2021-05-02 16:13:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:55,719 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:55,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247664964] [2021-05-02 16:13:55,719 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 16:13:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:55,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 16:13:55,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:55,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,878 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 16:13:55,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:55,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443809694] [2021-05-02 16:13:55,879 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:55,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247664964] [2021-05-02 16:13:55,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247664964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:55,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:55,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:13:55,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523948149] [2021-05-02 16:13:55,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:13:55,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:55,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:13:55,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:13:55,882 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 16:13:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:56,000 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-02 16:13:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:13:56,001 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 16:13:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:56,002 INFO L225 Difference]: With dead ends: 37 [2021-05-02 16:13:56,002 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 16:13:56,002 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:13:56,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 16:13:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 16:13:56,007 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 16:13:56,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 16:13:56,008 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 16:13:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:56,009 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 16:13:56,009 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 16:13:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 16:13:56,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 16:13:56,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:56,010 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 16:13:56,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:56,228 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:56,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:56,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2021-05-02 16:13:56,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:56,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167486440] [2021-05-02 16:13:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:56,239 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:56,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261622611] [2021-05-02 16:13:56,240 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 16:13:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:56,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:13:56,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:56,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,528 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 16:13:56,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:56,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167486440] [2021-05-02 16:13:56,529 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:56,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261622611] [2021-05-02 16:13:56,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261622611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:56,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:56,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:13:56,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012461862] [2021-05-02 16:13:56,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:13:56,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:56,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:13:56,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:13:56,533 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 16:13:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:56,684 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 16:13:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:13:56,685 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 16:13:56,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:56,689 INFO L225 Difference]: With dead ends: 39 [2021-05-02 16:13:56,689 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 16:13:56,690 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:13:56,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 16:13:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-05-02 16:13:56,700 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 16:13:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-02 16:13:56,705 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-02 16:13:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:56,705 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-02 16:13:56,705 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 16:13:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-02 16:13:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 16:13:56,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:56,707 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 16:13:56,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:56,921 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:56,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2021-05-02 16:13:56,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:56,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286571635] [2021-05-02 16:13:56,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:56,935 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:56,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281900680] [2021-05-02 16:13:56,936 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 16:13:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:56,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:13:56,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:57,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,070 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 16:13:57,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:57,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286571635] [2021-05-02 16:13:57,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:57,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281900680] [2021-05-02 16:13:57,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281900680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:57,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:57,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:13:57,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604218549] [2021-05-02 16:13:57,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:13:57,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:57,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:13:57,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:13:57,072 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 16:13:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:57,103 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-05-02 16:13:57,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:13:57,103 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 16:13:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:57,104 INFO L225 Difference]: With dead ends: 43 [2021-05-02 16:13:57,104 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 16:13:57,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:13:57,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 16:13:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 16:13:57,109 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 16:13:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-02 16:13:57,110 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-02 16:13:57,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:57,110 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-02 16:13:57,111 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 16:13:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-02 16:13:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 16:13:57,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:57,112 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 16:13:57,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:57,325 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:57,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 2 times [2021-05-02 16:13:57,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:57,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146225147] [2021-05-02 16:13:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:57,335 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:57,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86308499] [2021-05-02 16:13:57,335 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 16:13:57,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:13:57,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:57,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:13:57,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:57,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:57,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:57,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146225147] [2021-05-02 16:13:57,575 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:57,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86308499] [2021-05-02 16:13:57,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86308499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:57,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:57,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:13:57,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612227849] [2021-05-02 16:13:57,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:13:57,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:57,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:13:57,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:13:57,579 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 16:13:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:57,629 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-02 16:13:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:13:57,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 16:13:57,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:57,630 INFO L225 Difference]: With dead ends: 52 [2021-05-02 16:13:57,630 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 16:13:57,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:13:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 16:13:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 16:13:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:13:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-02 16:13:57,638 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-02 16:13:57,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:57,638 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-02 16:13:57,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 16:13:57,638 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-02 16:13:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 16:13:57,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:57,639 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:57,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 16:13:57,853 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:57,853 INFO L82 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 3 times [2021-05-02 16:13:57,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:57,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419744552] [2021-05-02 16:13:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:57,872 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:57,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058189121] [2021-05-02 16:13:57,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:57,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 16:13:57,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:57,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 16:13:57,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:57,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:58,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:58,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419744552] [2021-05-02 16:13:58,150 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:58,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058189121] [2021-05-02 16:13:58,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058189121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:58,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:58,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 16:13:58,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303137621] [2021-05-02 16:13:58,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:13:58,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:58,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:13:58,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:13:58,152 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 16:13:58,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:58,222 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-05-02 16:13:58,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 16:13:58,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2021-05-02 16:13:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:58,224 INFO L225 Difference]: With dead ends: 61 [2021-05-02 16:13:58,224 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 16:13:58,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:13:58,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 16:13:58,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 16:13:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:13:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-05-02 16:13:58,231 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2021-05-02 16:13:58,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:58,232 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-05-02 16:13:58,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 16:13:58,232 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-05-02 16:13:58,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 16:13:58,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:58,233 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:58,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:58,449 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:58,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:58,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 4 times [2021-05-02 16:13:58,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:58,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673175728] [2021-05-02 16:13:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:58,458 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:58,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328503196] [2021-05-02 16:13:58,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:58,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:13:58,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:58,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 16:13:58,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:58,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:58,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:58,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673175728] [2021-05-02 16:13:58,722 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:58,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328503196] [2021-05-02 16:13:58,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328503196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:58,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:58,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:13:58,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705082429] [2021-05-02 16:13:58,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:13:58,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:58,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:13:58,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:13:58,724 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 16:13:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:58,803 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-05-02 16:13:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 16:13:58,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-02 16:13:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:58,804 INFO L225 Difference]: With dead ends: 70 [2021-05-02 16:13:58,804 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 16:13:58,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:13:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 16:13:58,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 16:13:58,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:13:58,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-02 16:13:58,812 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2021-05-02 16:13:58,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:58,813 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-02 16:13:58,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 16:13:58,813 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-02 16:13:58,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 16:13:58,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:58,814 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:59,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:59,036 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:59,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:59,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 5 times [2021-05-02 16:13:59,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:59,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127757212] [2021-05-02 16:13:59,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:59,044 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:59,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608962914] [2021-05-02 16:13:59,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:59,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 16:13:59,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 16:13:59,117 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 16:13:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 16:13:59,143 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 16:13:59,251 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 16:13:59,251 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 16:13:59,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 16:13:59,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 04:13:59 BoogieIcfgContainer [2021-05-02 16:13:59,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 16:13:59,492 INFO L168 Benchmark]: Toolchain (without parser) took 5478.41 ms. Allocated memory was 196.1 MB in the beginning and 235.9 MB in the end (delta: 39.8 MB). Free memory was 160.1 MB in the beginning and 178.5 MB in the end (delta: -18.4 MB). Peak memory consumption was 22.2 MB. Max. memory is 8.0 GB. [2021-05-02 16:13:59,492 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 196.1 MB. Free memory is still 176.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 16:13:59,492 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.80 ms. Allocated memory is still 196.1 MB. Free memory was 159.9 MB in the beginning and 179.2 MB in the end (delta: -19.2 MB). Peak memory consumption was 10.6 MB. Max. memory is 8.0 GB. [2021-05-02 16:13:59,492 INFO L168 Benchmark]: Boogie Preprocessor took 39.06 ms. Allocated memory is still 196.1 MB. Free memory was 179.2 MB in the beginning and 177.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 16:13:59,492 INFO L168 Benchmark]: RCFGBuilder took 313.08 ms. Allocated memory is still 196.1 MB. Free memory was 177.6 MB in the beginning and 162.4 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 16:13:59,492 INFO L168 Benchmark]: TraceAbstraction took 4864.26 ms. Allocated memory was 196.1 MB in the beginning and 235.9 MB in the end (delta: 39.8 MB). Free memory was 161.9 MB in the beginning and 178.5 MB in the end (delta: -16.6 MB). Peak memory consumption was 24.3 MB. Max. memory is 8.0 GB. [2021-05-02 16:13:59,493 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 196.1 MB. Free memory is still 176.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.80 ms. Allocated memory is still 196.1 MB. Free memory was 159.9 MB in the beginning and 179.2 MB in the end (delta: -19.2 MB). Peak memory consumption was 10.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.06 ms. Allocated memory is still 196.1 MB. Free memory was 179.2 MB in the beginning and 177.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 313.08 ms. Allocated memory is still 196.1 MB. Free memory was 177.6 MB in the beginning and 162.4 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4864.26 ms. Allocated memory was 196.1 MB in the beginning and 235.9 MB in the end (delta: 39.8 MB). Free memory was 161.9 MB in the beginning and 178.5 MB in the end (delta: -16.6 MB). Peak memory consumption was 24.3 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)=13, 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=6, 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=6, x2=1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [\old(counter)=0, counter=0, x1=6, x2=1, y1=0, y2=0, y3=6] [L36] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, x1=6, x2=1, y1=0, y2=0, y3=6] [L36] COND TRUE counter++<5 [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=6, x2=1, y1=0, y2=0, y3=6] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=1, x1=6, x2=1, y1=0, y2=0, y3=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=1, x1=6, x2=1, y1=1, y2=0, y3=5] [L36] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, x1=6, x2=1, y1=1, y2=0, y3=5] [L36] COND TRUE counter++<5 [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=6, x2=1, y1=1, y2=0, y3=5] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=2, x1=6, x2=1, y1=1, y2=0, y3=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=2, x1=6, x2=1, y1=2, y2=0, y3=4] [L36] EXPR counter++ VAL [\old(counter)=0, counter=3, counter++=2, x1=6, x2=1, y1=2, y2=0, y3=4] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=3, x1=6, x2=1, y1=2, y2=0, y3=4] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=3, x1=6, x2=1, y1=2, y2=0, y3=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=3, x1=6, x2=1, y1=3, y2=0, y3=3] [L36] EXPR counter++ VAL [\old(counter)=0, counter=4, counter++=3, x1=6, x2=1, y1=3, y2=0, y3=3] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=4, x1=6, x2=1, y1=3, y2=0, y3=3] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=4, x1=6, x2=1, y1=3, 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=4, x1=6, x2=1, y1=4, y2=0, y3=2] [L36] EXPR counter++ VAL [\old(counter)=0, counter=5, counter++=4, x1=6, x2=1, y1=4, y2=0, y3=2] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=5, x1=6, x2=1, y1=4, y2=0, y3=2] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=5, x1=6, x2=1, y1=4, 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=5, x1=6, x2=1, y1=5, y2=0, y3=1] [L36] EXPR counter++ VAL [\old(counter)=0, counter=6, counter++=5, x1=6, x2=1, y1=5, y2=0, y3=1] [L36] COND FALSE !(counter++<5) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L18] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4774.3ms, OverallIterations: 9, TraceHistogramMax: 6, EmptinessCheckTime: 20.2ms, AutomataDifference: 664.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 207 SDtfs, 102 SDslu, 520 SDs, 0 SdLazy, 284 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 276.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 276 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 365.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=8, InterpolantAutomatonStates: 62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 84.3ms AutomataMinimizationTime, 8 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 121.4ms SsaConstructionTime, 283.1ms SatisfiabilityAnalysisTime, 1234.4ms InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 271 ConstructedInterpolants, 0 QuantifiedInterpolants, 772 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1130 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 47/164 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...