/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/cohendiv-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 01:43:00,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 01:43:00,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 01:43:00,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 01:43:00,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 01:43:00,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 01:43:00,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 01:43:00,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 01:43:01,021 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 01:43:01,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 01:43:01,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 01:43:01,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 01:43:01,024 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 01:43:01,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 01:43:01,024 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 01:43:01,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 01:43:01,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 01:43:01,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 01:43:01,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 01:43:01,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 01:43:01,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 01:43:01,026 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 01:43:01,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 01:43:01,026 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 01:43:01,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 01:43:01,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 01:43:01,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 01:43:01,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 01:43:01,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:43:01,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 01:43:01,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 01:43:01,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 01:43:01,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 01:43:01,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 01:43:01,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 01:43:01,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 01:43:01,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 01:43:01,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 01:43:01,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 01:43:01,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 01:43:01,349 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 01:43:01,350 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 01:43:01,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound100.c [2021-05-06 01:43:01,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8b31af27/91d84399080444a59d12f616e32d2e8c/FLAG01f6be4d6 [2021-05-06 01:43:01,778 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 01:43:01,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound100.c [2021-05-06 01:43:01,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8b31af27/91d84399080444a59d12f616e32d2e8c/FLAG01f6be4d6 [2021-05-06 01:43:02,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8b31af27/91d84399080444a59d12f616e32d2e8c [2021-05-06 01:43:02,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 01:43:02,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 01:43:02,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 01:43:02,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 01:43:02,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 01:43:02,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:43:02" (1/1) ... [2021-05-06 01:43:02,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c03f9b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:43:02, skipping insertion in model container [2021-05-06 01:43:02,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:43:02" (1/1) ... [2021-05-06 01:43:02,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 01:43:02,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 01:43:02,347 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/cohendiv-ll_valuebound100.c[576,589] [2021-05-06 01:43:02,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:43:02,367 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 01:43:02,422 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/cohendiv-ll_valuebound100.c[576,589] [2021-05-06 01:43:02,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:43:02,456 INFO L208 MainTranslator]: Completed translation [2021-05-06 01:43:02,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:43:02 WrapperNode [2021-05-06 01:43:02,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 01:43:02,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 01:43:02,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 01:43:02,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 01:43:02,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:43:02" (1/1) ... [2021-05-06 01:43:02,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:43:02" (1/1) ... [2021-05-06 01:43:02,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:43:02" (1/1) ... [2021-05-06 01:43:02,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:43:02" (1/1) ... [2021-05-06 01:43:02,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:43:02" (1/1) ... [2021-05-06 01:43:02,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:43:02" (1/1) ... [2021-05-06 01:43:02,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:43:02" (1/1) ... [2021-05-06 01:43:02,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 01:43:02,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 01:43:02,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 01:43:02,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 01:43:02,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:43:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:43:02,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 01:43:02,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 01:43:02,570 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 01:43:02,570 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 01:43:02,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 01:43:02,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 01:43:02,570 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 01:43:02,571 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 01:43:02,571 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 01:43:02,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 01:43:02,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 01:43:02,571 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 01:43:02,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 01:43:02,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 01:43:02,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 01:43:02,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 01:43:02,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 01:43:02,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 01:43:02,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 01:43:02,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 01:43:02,856 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 01:43:02,857 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 01:43:02,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:43:02 BoogieIcfgContainer [2021-05-06 01:43:02,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 01:43:02,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 01:43:02,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 01:43:02,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 01:43:02,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 01:43:02" (1/3) ... [2021-05-06 01:43:02,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@791e729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:43:02, skipping insertion in model container [2021-05-06 01:43:02,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:43:02" (2/3) ... [2021-05-06 01:43:02,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@791e729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:43:02, skipping insertion in model container [2021-05-06 01:43:02,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:43:02" (3/3) ... [2021-05-06 01:43:02,871 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound100.c [2021-05-06 01:43:02,876 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 01:43:02,879 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 01:43:02,899 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 01:43:02,918 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 01:43:02,918 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 01:43:02,919 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 01:43:02,919 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 01:43:02,919 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 01:43:02,919 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 01:43:02,919 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 01:43:02,919 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 01:43:02,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 01:43:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 01:43:02,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:43:02,944 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:43:02,944 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:43:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:43:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 1 times [2021-05-06 01:43:02,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:43:02,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020188421] [2021-05-06 01:43:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:43:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:43:03,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 01:43:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:43:03,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 01:43:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:43:03,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 01:43:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:43:03,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 01:43:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:43:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 01:43:03,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:43:03,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020188421] [2021-05-06 01:43:03,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020188421] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:43:03,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:43:03,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 01:43:03,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403345382] [2021-05-06 01:43:03,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 01:43:03,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:43:03,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 01:43:03,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:43:03,285 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 01:43:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:43:03,469 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2021-05-06 01:43:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 01:43:03,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 01:43:03,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:43:03,476 INFO L225 Difference]: With dead ends: 71 [2021-05-06 01:43:03,476 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 01:43:03,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:43:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 01:43:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 01:43:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 01:43:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-06 01:43:03,516 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2021-05-06 01:43:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:43:03,516 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-06 01:43:03,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 01:43:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-06 01:43:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 01:43:03,518 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:43:03,518 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:43:03,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 01:43:03,519 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:43:03,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:43:03,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 1 times [2021-05-06 01:43:03,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:43:03,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046608265] [2021-05-06 01:43:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:43:03,536 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:43:03,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732489356] [2021-05-06 01:43:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:43:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:43:03,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 01:43:03,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:43:03,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:03,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:03,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:03,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:03,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 01:43:03,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:43:03,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046608265] [2021-05-06 01:43:03,856 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:43:03,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732489356] [2021-05-06 01:43:03,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732489356] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:43:03,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:43:03,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 01:43:03,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959573590] [2021-05-06 01:43:03,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 01:43:03,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:43:03,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 01:43:03,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 01:43:03,859 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 01:43:04,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:43:04,020 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-06 01:43:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 01:43:04,021 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 01:43:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:43:04,023 INFO L225 Difference]: With dead ends: 45 [2021-05-06 01:43:04,023 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 01:43:04,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:43:04,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 01:43:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 01:43:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 01:43:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-06 01:43:04,036 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2021-05-06 01:43:04,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:43:04,036 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-06 01:43:04,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 01:43:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-06 01:43:04,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 01:43:04,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:43:04,037 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:43:04,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 01:43:04,254 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:43:04,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:43:04,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 1 times [2021-05-06 01:43:04,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:43:04,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635289969] [2021-05-06 01:43:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:43:04,277 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:43:04,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559503990] [2021-05-06 01:43:04,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:43:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:43:04,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 01:43:04,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:43:04,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:04,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:04,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:04,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:04,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:04,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:04,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 01:43:04,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:43:04,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635289969] [2021-05-06 01:43:04,531 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:43:04,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559503990] [2021-05-06 01:43:04,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559503990] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:43:04,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:43:04,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 01:43:04,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283127844] [2021-05-06 01:43:04,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 01:43:04,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:43:04,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 01:43:04,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 01:43:04,533 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 01:43:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:43:04,699 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-05-06 01:43:04,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 01:43:04,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-05-06 01:43:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:43:04,701 INFO L225 Difference]: With dead ends: 57 [2021-05-06 01:43:04,701 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 01:43:04,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:43:04,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 01:43:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 01:43:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 01:43:04,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-05-06 01:43:04,714 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2021-05-06 01:43:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:43:04,714 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-05-06 01:43:04,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 01:43:04,714 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-05-06 01:43:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 01:43:04,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:43:04,715 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:43:04,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:43:04,929 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:43:04,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:43:04,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 1 times [2021-05-06 01:43:04,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:43:04,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694882480] [2021-05-06 01:43:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:43:04,947 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:43:04,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064904122] [2021-05-06 01:43:04,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:43:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:43:05,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 01:43:05,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:43:05,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 01:43:05,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:43:05,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694882480] [2021-05-06 01:43:05,122 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:43:05,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064904122] [2021-05-06 01:43:05,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064904122] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:43:05,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:43:05,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 01:43:05,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261191983] [2021-05-06 01:43:05,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:43:05,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:43:05,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:43:05,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:43:05,123 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 01:43:05,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:43:05,198 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2021-05-06 01:43:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 01:43:05,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2021-05-06 01:43:05,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:43:05,200 INFO L225 Difference]: With dead ends: 79 [2021-05-06 01:43:05,200 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 01:43:05,206 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:43:05,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 01:43:05,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2021-05-06 01:43:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 01:43:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2021-05-06 01:43:05,232 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 40 [2021-05-06 01:43:05,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:43:05,233 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2021-05-06 01:43:05,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 01:43:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2021-05-06 01:43:05,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 01:43:05,237 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:43:05,237 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:43:05,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:43:05,462 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:43:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:43:05,463 INFO L82 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 1 times [2021-05-06 01:43:05,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:43:05,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638845663] [2021-05-06 01:43:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:43:05,476 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:43:05,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210396472] [2021-05-06 01:43:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:43:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:43:05,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 01:43:05,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:43:05,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:05,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:05,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:05,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:05,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:05,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:05,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:05,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:05,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:05,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:05,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:05,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-06 01:43:05,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:43:05,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638845663] [2021-05-06 01:43:05,712 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:43:05,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210396472] [2021-05-06 01:43:05,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210396472] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:43:05,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:43:05,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 01:43:05,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818446986] [2021-05-06 01:43:05,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:43:05,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:43:05,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:43:05,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:43:05,714 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 01:43:05,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:43:05,831 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2021-05-06 01:43:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:43:05,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-05-06 01:43:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:43:05,837 INFO L225 Difference]: With dead ends: 76 [2021-05-06 01:43:05,838 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 01:43:05,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:43:05,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 01:43:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 01:43:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 01:43:05,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-05-06 01:43:05,867 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 50 [2021-05-06 01:43:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:43:05,868 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-05-06 01:43:05,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 01:43:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-05-06 01:43:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 01:43:05,871 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:43:05,871 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:43:06,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:43:06,082 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:43:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:43:06,082 INFO L82 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 1 times [2021-05-06 01:43:06,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:43:06,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809015388] [2021-05-06 01:43:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:43:06,102 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:43:06,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817333742] [2021-05-06 01:43:06,103 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 [2021-05-06 01:43:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:43:06,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 01:43:06,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:43:06,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:06,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:06,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 01:43:06,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:43:06,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809015388] [2021-05-06 01:43:06,358 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:43:06,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817333742] [2021-05-06 01:43:06,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817333742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:43:06,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:43:06,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 01:43:06,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216954806] [2021-05-06 01:43:06,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:43:06,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:43:06,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:43:06,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:43:06,361 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 01:43:06,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:43:06,496 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2021-05-06 01:43:06,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:43:06,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-05-06 01:43:06,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:43:06,498 INFO L225 Difference]: With dead ends: 80 [2021-05-06 01:43:06,498 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 01:43:06,498 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:43:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 01:43:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 01:43:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 01:43:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2021-05-06 01:43:06,511 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 56 [2021-05-06 01:43:06,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:43:06,511 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2021-05-06 01:43:06,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 01:43:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2021-05-06 01:43:06,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 01:43:06,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:43:06,513 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:43:06,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 01:43:06,729 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:43:06,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:43:06,730 INFO L82 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 1 times [2021-05-06 01:43:06,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:43:06,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519388594] [2021-05-06 01:43:06,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:43:06,741 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:43:06,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587804752] [2021-05-06 01:43:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 01:43:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:43:06,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 01:43:06,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:43:06,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 01:43:07,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:43:07,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519388594] [2021-05-06 01:43:07,007 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:43:07,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587804752] [2021-05-06 01:43:07,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587804752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:43:07,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:43:07,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 01:43:07,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671988715] [2021-05-06 01:43:07,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 01:43:07,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:43:07,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 01:43:07,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:43:07,009 INFO L87 Difference]: Start difference. First operand 78 states and 98 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), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 01:43:07,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:43:07,150 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2021-05-06 01:43:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 01:43:07,151 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), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2021-05-06 01:43:07,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:43:07,152 INFO L225 Difference]: With dead ends: 111 [2021-05-06 01:43:07,152 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 01:43:07,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:43:07,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 01:43:07,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2021-05-06 01:43:07,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 60 states have internal predecessors, (66), 34 states have call successors, (34), 11 states have call predecessors, (34), 10 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 01:43:07,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2021-05-06 01:43:07,169 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 63 [2021-05-06 01:43:07,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:43:07,170 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2021-05-06 01:43:07,170 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), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 01:43:07,170 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2021-05-06 01:43:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 01:43:07,171 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:43:07,171 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 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, 1, 1, 1, 1] [2021-05-06 01:43:07,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:43:07,389 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:43:07,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:43:07,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 1 times [2021-05-06 01:43:07,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:43:07,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739203031] [2021-05-06 01:43:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:43:07,397 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:43:07,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929054610] [2021-05-06 01:43:07,398 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 [2021-05-06 01:43:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:43:07,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 01:43:07,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:43:07,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-05-06 01:43:07,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:43:07,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739203031] [2021-05-06 01:43:07,693 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:43:07,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929054610] [2021-05-06 01:43:07,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929054610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:43:07,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:43:07,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 01:43:07,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120801567] [2021-05-06 01:43:07,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:43:07,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:43:07,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:43:07,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:43:07,695 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 01:43:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:43:07,896 INFO L93 Difference]: Finished difference Result 143 states and 188 transitions. [2021-05-06 01:43:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:43:07,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2021-05-06 01:43:07,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:43:07,899 INFO L225 Difference]: With dead ends: 143 [2021-05-06 01:43:07,899 INFO L226 Difference]: Without dead ends: 140 [2021-05-06 01:43:07,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 01:43:07,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-06 01:43:07,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 117. [2021-05-06 01:43:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 69 states have internal predecessors, (75), 39 states have call successors, (39), 12 states have call predecessors, (39), 11 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 01:43:07,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 151 transitions. [2021-05-06 01:43:07,916 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 151 transitions. Word has length 86 [2021-05-06 01:43:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:43:07,917 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 151 transitions. [2021-05-06 01:43:07,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 01:43:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 151 transitions. [2021-05-06 01:43:07,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 01:43:07,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:43:07,918 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 01:43:08,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:43:08,133 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:43:08,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:43:08,133 INFO L82 PathProgramCache]: Analyzing trace with hash -895340852, now seen corresponding path program 2 times [2021-05-06 01:43:08,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:43:08,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14453514] [2021-05-06 01:43:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:43:08,145 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:43:08,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635136598] [2021-05-06 01:43:08,145 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:43:08,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:43:08,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:43:08,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 01:43:08,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:43:08,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-06 01:43:08,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:43:08,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14453514] [2021-05-06 01:43:08,441 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:43:08,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635136598] [2021-05-06 01:43:08,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635136598] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:43:08,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:43:08,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 01:43:08,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185341320] [2021-05-06 01:43:08,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:43:08,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:43:08,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:43:08,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:43:08,442 INFO L87 Difference]: Start difference. First operand 117 states and 151 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 01:43:08,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:43:08,499 INFO L93 Difference]: Finished difference Result 181 states and 237 transitions. [2021-05-06 01:43:08,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:43:08,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2021-05-06 01:43:08,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:43:08,501 INFO L225 Difference]: With dead ends: 181 [2021-05-06 01:43:08,501 INFO L226 Difference]: Without dead ends: 121 [2021-05-06 01:43:08,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:43:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-06 01:43:08,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2021-05-06 01:43:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 65 states have (on average 1.123076923076923) internal successors, (73), 66 states have internal predecessors, (73), 39 states have call successors, (39), 12 states have call predecessors, (39), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 01:43:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 149 transitions. [2021-05-06 01:43:08,519 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 149 transitions. Word has length 93 [2021-05-06 01:43:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:43:08,519 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 149 transitions. [2021-05-06 01:43:08,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 01:43:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 149 transitions. [2021-05-06 01:43:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 01:43:08,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:43:08,521 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 01:43:08,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 01:43:08,737 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:43:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:43:08,738 INFO L82 PathProgramCache]: Analyzing trace with hash -39671046, now seen corresponding path program 2 times [2021-05-06 01:43:08,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:43:08,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552735866] [2021-05-06 01:43:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:43:08,745 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:43:08,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536256250] [2021-05-06 01:43:08,746 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:43:08,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:43:08,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:43:08,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 01:43:08,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:43:08,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:08,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 45 proven. 42 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-05-06 01:43:09,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:43:09,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552735866] [2021-05-06 01:43:09,427 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:43:09,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536256250] [2021-05-06 01:43:09,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536256250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:43:09,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:43:09,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 01:43:09,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972751064] [2021-05-06 01:43:09,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 01:43:09,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:43:09,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 01:43:09,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 01:43:09,430 INFO L87 Difference]: Start difference. First operand 116 states and 149 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 01:43:10,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:43:10,111 INFO L93 Difference]: Finished difference Result 156 states and 205 transitions. [2021-05-06 01:43:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 01:43:10,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 109 [2021-05-06 01:43:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:43:10,116 INFO L225 Difference]: With dead ends: 156 [2021-05-06 01:43:10,116 INFO L226 Difference]: Without dead ends: 153 [2021-05-06 01:43:10,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-06 01:43:10,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-06 01:43:10,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 127. [2021-05-06 01:43:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 72 states have internal predecessors, (80), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 01:43:10,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 164 transitions. [2021-05-06 01:43:10,135 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 164 transitions. Word has length 109 [2021-05-06 01:43:10,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:43:10,136 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 164 transitions. [2021-05-06 01:43:10,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 01:43:10,136 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 164 transitions. [2021-05-06 01:43:10,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 01:43:10,138 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:43:10,138 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:43:10,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:43:10,356 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:43:10,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:43:10,356 INFO L82 PathProgramCache]: Analyzing trace with hash 800180238, now seen corresponding path program 3 times [2021-05-06 01:43:10,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:43:10,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105325316] [2021-05-06 01:43:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:43:10,374 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:43:10,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864656583] [2021-05-06 01:43:10,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:43:10,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 01:43:10,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:43:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 01:43:10,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:43:10,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:10,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:10,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:10,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:10,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:10,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:10,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:43:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 123 proven. 35 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-05-06 01:43:10,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:43:10,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105325316] [2021-05-06 01:43:10,706 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:43:10,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864656583] [2021-05-06 01:43:10,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864656583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:43:10,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:43:10,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 01:43:10,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525190674] [2021-05-06 01:43:10,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 01:43:10,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:43:10,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 01:43:10,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:43:10,708 INFO L87 Difference]: Start difference. First operand 127 states and 164 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 01:43:10,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:43:10,961 INFO L93 Difference]: Finished difference Result 137 states and 176 transitions. [2021-05-06 01:43:10,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 01:43:10,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) Word has length 116 [2021-05-06 01:43:10,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:43:10,962 INFO L225 Difference]: With dead ends: 137 [2021-05-06 01:43:10,962 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 01:43:10,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-06 01:43:10,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 01:43:10,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 01:43:10,964 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) [2021-05-06 01:43:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 01:43:10,964 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2021-05-06 01:43:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:43:10,964 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 01:43:10,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 01:43:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 01:43:10,965 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 01:43:11,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:43:11,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 01:43:11,653 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 22 [2021-05-06 01:43:11,815 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2021-05-06 01:43:12,116 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 32 [2021-05-06 01:43:12,318 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2021-05-06 01:43:12,452 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2021-05-06 01:43:12,557 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 16 [2021-05-06 01:43:12,748 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-06 01:43:12,748 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-06 01:43:12,748 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-06 01:43:12,748 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 01:43:12,749 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|)) [2021-05-06 01:43:12,749 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 01:43:12,749 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 01:43:12,749 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 01:43:12,749 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 01:43:12,749 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 01:43:12,749 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-06 01:43:12,749 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-06 01:43:12,749 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-06 01:43:12,749 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-06 01:43:12,750 INFO L198 CegarLoopUtils]: For program point L64(line 64) no Hoare annotation was computed. [2021-05-06 01:43:12,750 INFO L198 CegarLoopUtils]: For program point L31(line 31) no Hoare annotation was computed. [2021-05-06 01:43:12,750 INFO L201 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: true [2021-05-06 01:43:12,750 INFO L194 CegarLoopUtils]: At program point L29-1(line 29) the Hoare annotation is: (and (<= main_~y~0 100) (<= 0 main_~y~0)) [2021-05-06 01:43:12,750 INFO L201 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-05-06 01:43:12,750 INFO L198 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-05-06 01:43:12,750 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 66) no Hoare annotation was computed. [2021-05-06 01:43:12,750 INFO L198 CegarLoopUtils]: For program point L50(lines 47 59) no Hoare annotation was computed. [2021-05-06 01:43:12,750 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (and (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 (* main_~y~0 main_~a~0)) (<= 1 main_~r~0)) [2021-05-06 01:43:12,750 INFO L194 CegarLoopUtils]: At program point L48-1(line 48) the Hoare annotation is: (and (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 (* main_~y~0 main_~a~0)) (<= 1 main_~r~0)) [2021-05-06 01:43:12,750 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 66) no Hoare annotation was computed. [2021-05-06 01:43:12,750 INFO L198 CegarLoopUtils]: For program point L40(lines 38 62) no Hoare annotation was computed. [2021-05-06 01:43:12,750 INFO L194 CegarLoopUtils]: At program point L38-2(lines 38 62) the Hoare annotation is: (and (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 (* main_~y~0 main_~a~0))) [2021-05-06 01:43:12,751 INFO L194 CegarLoopUtils]: At program point L38-3(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 100)) (.cse1 (<= 1 main_~y~0)) (.cse2 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (and .cse0 (= (+ (* main_~y~0 2) main_~r~0) main_~x~0) .cse1 .cse2 (= main_~q~0 2)) (and (= main_~x~0 (+ main_~y~0 main_~r~0)) .cse0 .cse1 .cse2 (= main_~q~0 1)) (and (= main_~q~0 0) .cse0 (= main_~x~0 main_~r~0) .cse1) (and (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) .cse0 (< main_~r~0 main_~y~0) .cse1 .cse2))) [2021-05-06 01:43:12,751 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 66) the Hoare annotation is: true [2021-05-06 01:43:12,751 INFO L194 CegarLoopUtils]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~a~0))) (and (<= main_~y~0 100) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= 1 main_~r~0) (= (+ main_~x~0 .cse0) (+ (* main_~y~0 main_~q~0) main_~r~0 main_~b~0)))) [2021-05-06 01:43:12,751 INFO L198 CegarLoopUtils]: For program point L55-1(line 55) no Hoare annotation was computed. [2021-05-06 01:43:12,751 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (and (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 (* main_~y~0 main_~a~0)) (<= 1 main_~r~0)) [2021-05-06 01:43:12,751 INFO L194 CegarLoopUtils]: At program point L47-2(lines 47 59) the Hoare annotation is: (and (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 (* main_~y~0 main_~a~0)) (<= 1 main_~r~0)) [2021-05-06 01:43:12,751 INFO L198 CegarLoopUtils]: For program point L47-3(lines 47 59) no Hoare annotation was computed. [2021-05-06 01:43:12,751 INFO L194 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (and (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 (* main_~y~0 main_~a~0))) [2021-05-06 01:43:12,751 INFO L194 CegarLoopUtils]: At program point L39-1(line 39) the Hoare annotation is: (and (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (<= main_~y~0 100) (<= 1 main_~y~0) (= main_~b~0 (* main_~y~0 main_~a~0))) [2021-05-06 01:43:12,752 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-06 01:43:12,752 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-06 01:43:12,752 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-06 01:43:12,752 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-06 01:43:12,752 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-06 01:43:12,752 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-06 01:43:12,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 01:43:12 BoogieIcfgContainer [2021-05-06 01:43:12,763 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 01:43:12,764 INFO L168 Benchmark]: Toolchain (without parser) took 10577.35 ms. Allocated memory was 197.1 MB in the beginning and 285.2 MB in the end (delta: 88.1 MB). Free memory was 161.9 MB in the beginning and 196.4 MB in the end (delta: -34.5 MB). Peak memory consumption was 149.2 MB. Max. memory is 8.0 GB. [2021-05-06 01:43:12,764 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 197.1 MB. Free memory is still 178.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 01:43:12,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.79 ms. Allocated memory is still 197.1 MB. Free memory was 161.7 MB in the beginning and 179.6 MB in the end (delta: -17.9 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2021-05-06 01:43:12,764 INFO L168 Benchmark]: Boogie Preprocessor took 42.16 ms. Allocated memory is still 197.1 MB. Free memory was 179.1 MB in the beginning and 178.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 01:43:12,764 INFO L168 Benchmark]: RCFGBuilder took 363.94 ms. Allocated memory is still 197.1 MB. Free memory was 178.1 MB in the beginning and 161.8 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 01:43:12,764 INFO L168 Benchmark]: TraceAbstraction took 9897.18 ms. Allocated memory was 197.1 MB in the beginning and 285.2 MB in the end (delta: 88.1 MB). Free memory was 161.3 MB in the beginning and 196.4 MB in the end (delta: -35.1 MB). Peak memory consumption was 148.9 MB. Max. memory is 8.0 GB. [2021-05-06 01:43:12,765 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 197.1 MB. Free memory is still 178.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 267.79 ms. Allocated memory is still 197.1 MB. Free memory was 161.7 MB in the beginning and 179.6 MB in the end (delta: -17.9 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.16 ms. Allocated memory is still 197.1 MB. Free memory was 179.1 MB in the beginning and 178.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 363.94 ms. Allocated memory is still 197.1 MB. Free memory was 178.1 MB in the beginning and 161.8 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9897.18 ms. Allocated memory was 197.1 MB in the beginning and 285.2 MB in the end (delta: 88.1 MB). Free memory was 161.3 MB in the beginning and 196.4 MB in the end (delta: -35.1 MB). Peak memory consumption was 148.9 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, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8274.2ms, OverallIterations: 11, TraceHistogramMax: 16, EmptinessCheckTime: 28.8ms, AutomataDifference: 2239.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1557.1ms, InitialAbstractionConstructionTime: 10.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 467 SDtfs, 227 SDslu, 1681 SDs, 0 SdLazy, 1388 SolverSat, 156 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1400.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 700 GetRequests, 614 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 778.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=127occurred in iteration=10, InterpolantAutomatonStates: 86, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 185.4ms AutomataMinimizationTime, 11 MinimizatonAttempts, 70 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 93 PreInvPairs, 156 NumberOfFragments, 302 HoareAnnotationTreeSize, 93 FomulaSimplifications, 8579 FormulaSimplificationTreeSizeReduction, 299.9ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 2374 FormulaSimplificationTreeSizeReductionInter, 1243.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 113.0ms SsaConstructionTime, 345.4ms SatisfiabilityAnalysisTime, 2499.4ms InterpolantComputationTime, 702 NumberOfCodeBlocks, 650 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 691 ConstructedInterpolants, 0 QuantifiedInterpolants, 2270 SizeOfPredicates, 32 NumberOfNonLiveVariables, 1900 ConjunctsInSsa, 160 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 1558/1653 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: 47]: Loop Invariant Derived loop invariant: (((y * q + r == x && y <= 100) && 1 <= y) && b == y * a) && 1 <= r - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((y * q + r == x && y <= 100) && 1 <= y) && b == y * a RESULT: Ultimate proved your program to be correct! Received shutdown request...