/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/hard2_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:40:38,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:40:38,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:40:38,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:40:38,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:40:38,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:40:38,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:40:38,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:40:38,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:40:38,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:40:38,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:40:38,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:40:38,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:40:38,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:40:38,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:40:38,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:40:38,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:40:38,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:40:38,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:40:38,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:40:38,888 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 15:40:38,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:40:38,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:40:38,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:40:38,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:40:38,923 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:40:38,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:40:38,923 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:40:38,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:40:38,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:40:38,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:40:38,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:40:38,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:40:38,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:40:38,924 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:40:38,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:40:38,924 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:40:38,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:40:38,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:40:38,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:40:38,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:40:38,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:40:38,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:40:38,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:40:38,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:40:38,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:40:38,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:40:38,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:40:38,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:40:38,926 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:40:39,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:40:39,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:40:39,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:40:39,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:40:39,285 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:40:39,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound1.c [2021-05-02 15:40:39,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b251ea842/b76114d3cddd49f88d94b38b6250b96b/FLAG1c5f1bc56 [2021-05-02 15:40:39,830 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:40:39,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound1.c [2021-05-02 15:40:39,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b251ea842/b76114d3cddd49f88d94b38b6250b96b/FLAG1c5f1bc56 [2021-05-02 15:40:40,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b251ea842/b76114d3cddd49f88d94b38b6250b96b [2021-05-02 15:40:40,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:40:40,317 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:40:40,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:40:40,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:40:40,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:40:40,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:40:40" (1/1) ... [2021-05-02 15:40:40,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@313d2e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:40, skipping insertion in model container [2021-05-02 15:40:40,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:40:40" (1/1) ... [2021-05-02 15:40:40,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:40:40,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:40:40,449 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/hard2_valuebound1.c[526,539] [2021-05-02 15:40:40,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:40:40,467 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:40:40,487 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/hard2_valuebound1.c[526,539] [2021-05-02 15:40:40,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:40:40,524 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:40:40,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:40 WrapperNode [2021-05-02 15:40:40,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:40:40,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:40:40,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:40:40,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:40:40,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:40" (1/1) ... [2021-05-02 15:40:40,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:40" (1/1) ... [2021-05-02 15:40:40,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:40" (1/1) ... [2021-05-02 15:40:40,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:40" (1/1) ... [2021-05-02 15:40:40,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:40" (1/1) ... [2021-05-02 15:40:40,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:40" (1/1) ... [2021-05-02 15:40:40,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:40" (1/1) ... [2021-05-02 15:40:40,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:40:40,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:40:40,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:40:40,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:40:40,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:40" (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 15:40:40,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:40:40,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:40:40,641 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:40:40,641 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:40:40,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:40:40,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:40:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:40:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:40:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:40:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:40:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:40:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:40:40,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:40:40,644 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:40:40,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:40:40,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:40:40,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:40:40,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:40:40,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:40:40,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:40:40,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:40:40,966 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:40:40,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:40:40 BoogieIcfgContainer [2021-05-02 15:40:40,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:40:40,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:40:40,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:40:40,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:40:40,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:40:40" (1/3) ... [2021-05-02 15:40:40,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5184661b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:40:40, skipping insertion in model container [2021-05-02 15:40:40,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:40" (2/3) ... [2021-05-02 15:40:40,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5184661b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:40:40, skipping insertion in model container [2021-05-02 15:40:40,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:40:40" (3/3) ... [2021-05-02 15:40:40,976 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound1.c [2021-05-02 15:40:40,980 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:40:40,983 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:40:40,995 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:40:41,012 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:40:41,012 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:40:41,012 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:40:41,012 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:40:41,012 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:40:41,013 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:40:41,013 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:40:41,013 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:40:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:40:41,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 15:40:41,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:41,030 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:41,030 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:41,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:41,034 INFO L82 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2021-05-02 15:40:41,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:41,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095752670] [2021-05-02 15:40:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:41,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:40:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:41,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:40:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:40:41,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:41,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095752670] [2021-05-02 15:40:41,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095752670] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:40:41,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:40:41,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:40:41,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698823768] [2021-05-02 15:40:41,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:40:41,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:41,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:40:41,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:40:41,287 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:40:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:41,456 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2021-05-02 15:40:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:40:41,458 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 15:40:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:41,465 INFO L225 Difference]: With dead ends: 61 [2021-05-02 15:40:41,465 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 15:40:41,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:40:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 15:40:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 15:40:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:40:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-02 15:40:41,522 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-02 15:40:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:41,522 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-02 15:40:41,523 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:40:41,523 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-02 15:40:41,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 15:40:41,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:41,524 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:41,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:40:41,524 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:41,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:41,528 INFO L82 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2021-05-02 15:40:41,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:41,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669224664] [2021-05-02 15:40:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:41,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:40:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:41,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:40:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:40:41,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:41,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669224664] [2021-05-02 15:40:41,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669224664] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:40:41,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:40:41,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:40:41,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220902843] [2021-05-02 15:40:41,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:40:41,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:41,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:40:41,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:40:41,751 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:40:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:42,057 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-05-02 15:40:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:40:42,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 15:40:42,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:42,059 INFO L225 Difference]: With dead ends: 43 [2021-05-02 15:40:42,059 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 15:40:42,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:40:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 15:40:42,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-02 15:40:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:40:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-02 15:40:42,069 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-02 15:40:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:42,070 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-02 15:40:42,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:40:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-02 15:40:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 15:40:42,071 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:42,071 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:42,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:40:42,071 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:42,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2021-05-02 15:40:42,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:42,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146549026] [2021-05-02 15:40:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:42,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:40:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:42,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:40:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:42,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 15:40:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:40:42,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:42,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146549026] [2021-05-02 15:40:42,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146549026] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:40:42,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:40:42,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:40:42,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210141433] [2021-05-02 15:40:42,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:40:42,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:42,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:40:42,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:40:42,189 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:40:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:42,482 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-05-02 15:40:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:40:42,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 15:40:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:42,494 INFO L225 Difference]: With dead ends: 47 [2021-05-02 15:40:42,494 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 15:40:42,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:40:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 15:40:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-02 15:40:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:40:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-02 15:40:42,502 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-02 15:40:42,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:42,503 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-02 15:40:42,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:40:42,503 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-02 15:40:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 15:40:42,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:42,504 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:42,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 15:40:42,504 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:42,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:42,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2021-05-02 15:40:42,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:42,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804966407] [2021-05-02 15:40:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:42,523 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:42,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441077576] [2021-05-02 15:40:42,524 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 15:40:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:42,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:40:42,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:40:42,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:42,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804966407] [2021-05-02 15:40:42,718 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:42,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441077576] [2021-05-02 15:40:42,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441077576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:42,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:42,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:40:42,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679393790] [2021-05-02 15:40:42,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:40:42,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:42,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:40:42,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:40:42,721 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 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 15:40:42,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:42,892 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2021-05-02 15:40:42,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:40:42,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 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 27 [2021-05-02 15:40:42,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:42,894 INFO L225 Difference]: With dead ends: 70 [2021-05-02 15:40:42,894 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 15:40:42,895 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:40:42,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 15:40:42,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 15:40:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:40:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-05-02 15:40:42,909 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2021-05-02 15:40:42,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:42,909 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-05-02 15:40:42,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 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 15:40:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-05-02 15:40:42,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 15:40:42,911 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:42,913 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:43,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:43,125 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:43,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:43,125 INFO L82 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2021-05-02 15:40:43,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:43,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632866183] [2021-05-02 15:40:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:43,137 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:43,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537883975] [2021-05-02 15:40:43,137 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 15:40:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:43,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:40:43,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 15:40:43,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:43,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632866183] [2021-05-02 15:40:43,352 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:43,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537883975] [2021-05-02 15:40:43,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537883975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:43,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:43,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:40:43,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533882566] [2021-05-02 15:40:43,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:40:43,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:43,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:40:43,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:40:43,354 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:40:43,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:43,471 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2021-05-02 15:40:43,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:40:43,472 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 15:40:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:43,473 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:40:43,473 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 15:40:43,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:40:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 15:40:43,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 15:40:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 15:40:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-05-02 15:40:43,484 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 34 [2021-05-02 15:40:43,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:43,485 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-05-02 15:40:43,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:40:43,485 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-05-02 15:40:43,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 15:40:43,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:43,486 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:43,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:43,701 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:43,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:43,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2021-05-02 15:40:43,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:43,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835266960] [2021-05-02 15:40:43,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:43,721 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:43,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763277417] [2021-05-02 15:40:43,722 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 15:40:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:43,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 15:40:43,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:43,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:43,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:40:44,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:44,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835266960] [2021-05-02 15:40:44,175 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:44,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763277417] [2021-05-02 15:40:44,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763277417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:44,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:44,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:40:44,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669499694] [2021-05-02 15:40:44,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:40:44,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:44,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:40:44,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:40:44,180 INFO L87 Difference]: Start difference. First operand 61 states and 72 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, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:40:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:44,462 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2021-05-02 15:40:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:40:44,463 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, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2021-05-02 15:40:44,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:44,468 INFO L225 Difference]: With dead ends: 90 [2021-05-02 15:40:44,468 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 15:40:44,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:40:44,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 15:40:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 15:40:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 48 states have internal predecessors, (53), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:40:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2021-05-02 15:40:44,501 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 44 [2021-05-02 15:40:44,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:44,502 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2021-05-02 15:40:44,502 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, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:40:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2021-05-02 15:40:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 15:40:44,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:44,508 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:44,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:44,709 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:44,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1230656439, now seen corresponding path program 2 times [2021-05-02 15:40:44,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:44,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291322916] [2021-05-02 15:40:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:44,734 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:44,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500174802] [2021-05-02 15:40:44,735 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 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 15:40:44,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:40:44,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:40:44,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 15:40:44,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:44,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:44,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:45,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:45,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:45,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-05-02 15:40:45,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:45,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291322916] [2021-05-02 15:40:45,049 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:45,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500174802] [2021-05-02 15:40:45,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500174802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:40:45,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:40:45,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 15:40:45,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897137864] [2021-05-02 15:40:45,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:40:45,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:45,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:40:45,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:40:45,052 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:40:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:45,160 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2021-05-02 15:40:45,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:40:45,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-02 15:40:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:45,162 INFO L225 Difference]: With dead ends: 117 [2021-05-02 15:40:45,162 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 15:40:45,163 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:40:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 15:40:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2021-05-02 15:40:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 15:40:45,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2021-05-02 15:40:45,172 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 61 [2021-05-02 15:40:45,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:45,172 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2021-05-02 15:40:45,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:40:45,173 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2021-05-02 15:40:45,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 15:40:45,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:45,174 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 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] [2021-05-02 15:40:45,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:45,389 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:45,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2021-05-02 15:40:45,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:45,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463293884] [2021-05-02 15:40:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:45,396 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:45,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259722651] [2021-05-02 15:40:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:40:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:45,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 15:40:45,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 15:40:45,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:45,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463293884] [2021-05-02 15:40:45,713 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:45,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259722651] [2021-05-02 15:40:45,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259722651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:45,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:45,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:40:45,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073553124] [2021-05-02 15:40:45,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:40:45,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:45,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:40:45,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:40:45,714 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 15:40:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:45,906 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2021-05-02 15:40:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:40:45,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2021-05-02 15:40:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:45,908 INFO L225 Difference]: With dead ends: 104 [2021-05-02 15:40:45,908 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 15:40:45,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:40:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 15:40:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-05-02 15:40:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 46 states have internal predecessors, (50), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:40:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2021-05-02 15:40:45,918 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 64 [2021-05-02 15:40:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:45,918 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2021-05-02 15:40:45,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 15:40:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2021-05-02 15:40:45,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 15:40:45,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:45,920 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 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, 1, 1, 1, 1] [2021-05-02 15:40:46,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 15:40:46,137 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:46,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:46,138 INFO L82 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 2 times [2021-05-02 15:40:46,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:46,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766845467] [2021-05-02 15:40:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:46,145 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:46,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320437006] [2021-05-02 15:40:46,145 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 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 15:40:46,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:40:46,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:40:46,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 15:40:46,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-02 15:40:46,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:46,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766845467] [2021-05-02 15:40:46,423 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:46,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320437006] [2021-05-02 15:40:46,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320437006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:46,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:46,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:40:46,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545955794] [2021-05-02 15:40:46,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:40:46,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:46,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:40:46,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:40:46,425 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 15:40:46,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:46,554 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2021-05-02 15:40:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:40:46,555 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 69 [2021-05-02 15:40:46,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:46,556 INFO L225 Difference]: With dead ends: 93 [2021-05-02 15:40:46,556 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 15:40:46,557 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:40:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 15:40:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 15:40:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.0) internal successors, (43), 43 states have internal predecessors, (43), 14 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 15:40:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-05-02 15:40:46,563 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 69 [2021-05-02 15:40:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:46,564 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-05-02 15:40:46,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 15:40:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-05-02 15:40:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 15:40:46,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:46,565 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 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, 1, 1, 1, 1, 1] [2021-05-02 15:40:46,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:46,784 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:46,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:46,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2021-05-02 15:40:46,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:46,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951652710] [2021-05-02 15:40:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:46,793 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:46,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275701322] [2021-05-02 15:40:46,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:40:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:46,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 15:40:46,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 15:40:47,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:47,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951652710] [2021-05-02 15:40:47,081 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:47,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275701322] [2021-05-02 15:40:47,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275701322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:47,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:47,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:40:47,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243133943] [2021-05-02 15:40:47,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:40:47,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:40:47,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:40:47,083 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:40:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:47,218 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-05-02 15:40:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:40:47,219 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-02 15:40:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:47,220 INFO L225 Difference]: With dead ends: 68 [2021-05-02 15:40:47,220 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:40:47,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:40:47,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:40:47,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:40:47,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 15:40:47,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:40:47,221 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2021-05-02 15:40:47,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:47,222 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:40:47,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:40:47,222 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:40:47,222 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:40:47,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:47,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:40:47,788 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 23 [2021-05-02 15:40:47,957 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-05-02 15:40:48,100 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2021-05-02 15:40:48,269 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-05-02 15:40:48,373 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2021-05-02 15:40:48,497 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2021-05-02 15:40:48,708 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2021-05-02 15:40:48,711 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 15:40:48,712 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 15:40:48,712 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 15:40:48,712 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:40:48,712 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 15:40:48,712 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:40:48,712 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:40:48,712 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 15:40:48,712 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:40:48,712 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:40:48,712 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-02 15:40:48,713 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 15:40:48,713 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:40:48,713 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:40:48,713 INFO L194 CegarLoopUtils]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (= main_~B~0 main_~d~0)) (.cse1 (= main_~p~0 1)) (.cse2 (= main_~B~0 1))) (or (and .cse0 (= main_~q~0 0) .cse1 .cse2) (and .cse0 (<= 0 main_~A~0) (<= main_~A~0 1) .cse1 .cse2))) [2021-05-02 15:40:48,713 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 61) no Hoare annotation was computed. [2021-05-02 15:40:48,713 INFO L198 CegarLoopUtils]: For program point L52(lines 52 55) no Hoare annotation was computed. [2021-05-02 15:40:48,713 INFO L198 CegarLoopUtils]: For program point L52-2(lines 22 61) no Hoare annotation was computed. [2021-05-02 15:40:48,713 INFO L198 CegarLoopUtils]: For program point L46(lines 44 56) no Hoare annotation was computed. [2021-05-02 15:40:48,713 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 61) no Hoare annotation was computed. [2021-05-02 15:40:48,713 INFO L194 CegarLoopUtils]: At program point L44-1(lines 44 56) the Hoare annotation is: (let ((.cse0 (= main_~p~0 1)) (.cse1 (= main_~B~0 1))) (or (and (<= 0 main_~A~0) (<= main_~A~0 1) (= main_~A~0 (+ main_~r~0 main_~d~0)) (= main_~d~0 1) (= main_~q~0 main_~p~0) .cse0 .cse1) (and (= main_~B~0 main_~d~0) (= main_~q~0 0) (= main_~A~0 main_~r~0) .cse0 .cse1))) [2021-05-02 15:40:48,714 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (<= 0 main_~A~0)) (.cse2 (<= main_~A~0 1)) (.cse3 (= main_~A~0 main_~r~0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse4) (let ((.cse5 (div main_~d~0 2))) (and .cse0 (<= main_~B~0 .cse5) .cse1 .cse2 (= main_~p~0 2) .cse3 (= (mod main_~d~0 2) 0) (<= .cse5 1) .cse4)))) [2021-05-02 15:40:48,714 INFO L194 CegarLoopUtils]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (<= 0 main_~A~0)) (.cse2 (<= main_~A~0 1)) (.cse3 (= main_~A~0 main_~r~0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse4) (let ((.cse5 (div main_~d~0 2))) (and .cse0 (<= main_~B~0 .cse5) .cse1 .cse2 (= main_~p~0 2) .cse3 (= (mod main_~d~0 2) 0) (<= .cse5 1) .cse4)))) [2021-05-02 15:40:48,714 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 61) the Hoare annotation is: true [2021-05-02 15:40:48,714 INFO L198 CegarLoopUtils]: For program point L59(line 59) no Hoare annotation was computed. [2021-05-02 15:40:48,714 INFO L201 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-05-02 15:40:48,714 INFO L198 CegarLoopUtils]: For program point L26-1(line 26) no Hoare annotation was computed. [2021-05-02 15:40:48,714 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 (<= 0 main_~A~0)) (.cse1 (<= main_~A~0 1)) (.cse4 (= main_~q~0 0)) (.cse6 (= main_~A~0 main_~r~0)) (.cse2 (= main_~p~0 1)) (.cse3 (= main_~B~0 1))) (or (and .cse0 .cse1 (= main_~A~0 (+ main_~r~0 main_~B~0)) (= main_~d~0 1) (= main_~q~0 1) .cse2 .cse3) (let ((.cse5 (div main_~d~0 2))) (and .cse4 (<= main_~B~0 .cse5) .cse0 .cse1 (= main_~p~0 2) .cse6 (= (mod main_~d~0 2) 0) (<= .cse5 1) .cse3)) (and (= main_~B~0 main_~d~0) .cse4 .cse6 .cse2 .cse3))) [2021-05-02 15:40:48,714 INFO L194 CegarLoopUtils]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse0 (<= 0 main_~A~0)) (.cse1 (<= main_~A~0 1)) (.cse4 (= main_~q~0 0)) (.cse6 (= main_~A~0 main_~r~0)) (.cse2 (= main_~p~0 1)) (.cse3 (= main_~B~0 1))) (or (and .cse0 .cse1 (= main_~A~0 (+ main_~r~0 main_~B~0)) (= main_~d~0 1) (= main_~q~0 1) .cse2 .cse3) (let ((.cse5 (div main_~d~0 2))) (and .cse4 (<= main_~B~0 .cse5) .cse0 .cse1 (= main_~p~0 2) .cse6 (= (mod main_~d~0 2) 0) (<= .cse5 1) .cse3)) (and (= main_~B~0 main_~d~0) .cse4 .cse6 .cse2 .cse3))) [2021-05-02 15:40:48,715 INFO L198 CegarLoopUtils]: For program point L37(lines 34 42) no Hoare annotation was computed. [2021-05-02 15:40:48,715 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (<= 0 main_~A~0)) (.cse2 (<= main_~A~0 1)) (.cse3 (= main_~A~0 main_~r~0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse4) (let ((.cse5 (div main_~d~0 2))) (and .cse0 (<= main_~B~0 .cse5) .cse1 .cse2 (= main_~p~0 2) .cse3 (= (mod main_~d~0 2) 0) (<= .cse5 1) .cse4)))) [2021-05-02 15:40:48,715 INFO L194 CegarLoopUtils]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (<= 0 main_~A~0)) (.cse2 (<= main_~A~0 1)) (.cse3 (= main_~A~0 main_~r~0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse4) (let ((.cse5 (div main_~d~0 2))) (and .cse0 (<= main_~B~0 .cse5) .cse1 .cse2 (= main_~p~0 2) .cse3 (= (mod main_~d~0 2) 0) (<= .cse5 1) .cse4)))) [2021-05-02 15:40:48,715 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 15:40:48,715 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 15:40:48,715 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 15:40:48,715 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:40:48,715 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:40:48,715 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 15:40:48,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:40:48 BoogieIcfgContainer [2021-05-02 15:40:48,728 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:40:48,729 INFO L168 Benchmark]: Toolchain (without parser) took 8412.07 ms. Allocated memory was 178.3 MB in the beginning and 256.9 MB in the end (delta: 78.6 MB). Free memory was 142.6 MB in the beginning and 220.1 MB in the end (delta: -77.5 MB). Peak memory consumption was 132.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:40:48,729 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 178.3 MB. Free memory is still 159.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:40:48,729 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.71 ms. Allocated memory is still 178.3 MB. Free memory was 142.4 MB in the beginning and 161.4 MB in the end (delta: -19.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:40:48,729 INFO L168 Benchmark]: Boogie Preprocessor took 39.99 ms. Allocated memory is still 178.3 MB. Free memory was 161.4 MB in the beginning and 159.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:40:48,730 INFO L168 Benchmark]: RCFGBuilder took 399.12 ms. Allocated memory is still 178.3 MB. Free memory was 159.8 MB in the beginning and 144.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:40:48,730 INFO L168 Benchmark]: TraceAbstraction took 7758.69 ms. Allocated memory was 178.3 MB in the beginning and 256.9 MB in the end (delta: 78.6 MB). Free memory was 143.6 MB in the beginning and 220.1 MB in the end (delta: -76.5 MB). Peak memory consumption was 134.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:40:48,730 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 178.3 MB. Free memory is still 159.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 206.71 ms. Allocated memory is still 178.3 MB. Free memory was 142.4 MB in the beginning and 161.4 MB in the end (delta: -19.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.99 ms. Allocated memory is still 178.3 MB. Free memory was 161.4 MB in the beginning and 159.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 399.12 ms. Allocated memory is still 178.3 MB. Free memory was 159.8 MB in the beginning and 144.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7758.69 ms. Allocated memory was 178.3 MB in the beginning and 256.9 MB in the end (delta: 78.6 MB). Free memory was 143.6 MB in the beginning and 220.1 MB in the end (delta: -76.5 MB). Peak memory consumption was 134.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6435.4ms, OverallIterations: 10, TraceHistogramMax: 11, EmptinessCheckTime: 18.2ms, AutomataDifference: 1974.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1265.5ms, InitialAbstractionConstructionTime: 9.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 303 SDtfs, 216 SDslu, 1073 SDs, 0 SdLazy, 1205 SolverSat, 174 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1030.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 420 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 948.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=6, InterpolantAutomatonStates: 76, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 140.4ms AutomataMinimizationTime, 10 MinimizatonAttempts, 29 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 15 LocationsWithAnnotation, 70 PreInvPairs, 92 NumberOfFragments, 486 HoareAnnotationTreeSize, 70 FomulaSimplifications, 5460 FormulaSimplificationTreeSizeReduction, 202.1ms HoareSimplificationTime, 15 FomulaSimplificationsInter, 1848 FormulaSimplificationTreeSizeReductionInter, 1052.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 106.8ms SsaConstructionTime, 262.1ms SatisfiabilityAnalysisTime, 1918.9ms InterpolantComputationTime, 430 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 420 ConstructedInterpolants, 0 QuantifiedInterpolants, 1685 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1226 ConjunctsInSsa, 178 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 646/737 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((q == 0 && 0 <= A) && A <= 1) && A == r) && d == 1) && p == 1) && B == 1) || ((((((((q == 0 && B <= d / 2) && 0 <= A) && A <= 1) && p == 2) && A == r) && d % 2 == 0) && d / 2 <= 1) && B == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...