/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/geo2-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:53:07,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:53:07,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:53:08,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:53:08,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:53:08,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:53:08,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:53:08,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:53:08,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:53:08,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:53:08,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:53:08,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:53:08,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:53:08,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:53:08,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:53:08,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:53:08,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:53:08,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:53:08,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:53:08,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:53:08,067 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 02:53:08,105 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:53:08,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:53:08,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:53:08,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:53:08,108 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:53:08,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:53:08,108 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:53:08,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:53:08,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:53:08,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:53:08,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:53:08,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:53:08,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:53:08,110 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:53:08,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:53:08,110 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:53:08,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:53:08,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:53:08,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:53:08,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:53:08,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:53:08,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:53:08,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:53:08,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:53:08,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:53:08,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:53:08,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:53:08,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:53:08,112 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:53:08,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:53:08,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:53:08,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:53:08,428 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:53:08,429 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:53:08,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound5.c [2021-05-06 02:53:08,493 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d298f900/5d5311b4469c436cad77d2e8489df553/FLAGbb88a380c [2021-05-06 02:53:08,824 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:53:08,825 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound5.c [2021-05-06 02:53:08,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d298f900/5d5311b4469c436cad77d2e8489df553/FLAGbb88a380c [2021-05-06 02:53:09,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d298f900/5d5311b4469c436cad77d2e8489df553 [2021-05-06 02:53:09,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:53:09,238 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:53:09,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:53:09,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:53:09,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:53:09,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:53:09" (1/1) ... [2021-05-06 02:53:09,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@618b567f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:53:09, skipping insertion in model container [2021-05-06 02:53:09,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:53:09" (1/1) ... [2021-05-06 02:53:09,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:53:09,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:53:09,360 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/geo2-ll_valuebound5.c[525,538] [2021-05-06 02:53:09,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:53:09,380 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:53:09,396 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/geo2-ll_valuebound5.c[525,538] [2021-05-06 02:53:09,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:53:09,473 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:53:09,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:53:09 WrapperNode [2021-05-06 02:53:09,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:53:09,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:53:09,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:53:09,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:53:09,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:53:09" (1/1) ... [2021-05-06 02:53:09,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:53:09" (1/1) ... [2021-05-06 02:53:09,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:53:09" (1/1) ... [2021-05-06 02:53:09,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:53:09" (1/1) ... [2021-05-06 02:53:09,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:53:09" (1/1) ... [2021-05-06 02:53:09,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:53:09" (1/1) ... [2021-05-06 02:53:09,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:53:09" (1/1) ... [2021-05-06 02:53:09,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:53:09,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:53:09,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:53:09,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:53:09,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:53:09" (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 02:53:09,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:53:09,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:53:09,562 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:53:09,562 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:53:09,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:53:09,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:53:09,562 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:53:09,563 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:53:09,563 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:53:09,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:53:09,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:53:09,563 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:53:09,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:53:09,564 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:53:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:53:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:53:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:53:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:53:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:53:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:53:09,845 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:53:09,845 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:53:09,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:53:09 BoogieIcfgContainer [2021-05-06 02:53:09,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:53:09,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:53:09,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:53:09,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:53:09,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:53:09" (1/3) ... [2021-05-06 02:53:09,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384d88a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:53:09, skipping insertion in model container [2021-05-06 02:53:09,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:53:09" (2/3) ... [2021-05-06 02:53:09,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384d88a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:53:09, skipping insertion in model container [2021-05-06 02:53:09,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:53:09" (3/3) ... [2021-05-06 02:53:09,853 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_valuebound5.c [2021-05-06 02:53:09,857 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:53:09,860 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:53:09,873 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:53:09,904 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:53:09,904 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:53:09,904 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:53:09,904 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:53:09,904 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:53:09,905 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:53:09,905 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:53:09,905 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:53:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:53:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:53:09,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:53:09,921 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:53:09,921 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:53:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:53:09,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1276201559, now seen corresponding path program 1 times [2021-05-06 02:53:09,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:53:09,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510715818] [2021-05-06 02:53:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:53:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:53:10,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:53:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:53:10,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:53:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:53:10,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:53:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:53:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:53:10,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:53:10,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510715818] [2021-05-06 02:53:10,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510715818] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:53:10,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:53:10,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:53:10,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240270023] [2021-05-06 02:53:10,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:53:10,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:53:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:53:10,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:53:10,240 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:53:10,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:53:10,358 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2021-05-06 02:53:10,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:53:10,361 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 02:53:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:53:10,367 INFO L225 Difference]: With dead ends: 51 [2021-05-06 02:53:10,367 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 02:53:10,369 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:53:10,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 02:53:10,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 02:53:10,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:53:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-06 02:53:10,402 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2021-05-06 02:53:10,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:53:10,402 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-06 02:53:10,402 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:53:10,402 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-06 02:53:10,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:53:10,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:53:10,404 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:53:10,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:53:10,404 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:53:10,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:53:10,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1874219407, now seen corresponding path program 1 times [2021-05-06 02:53:10,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:53:10,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769007755] [2021-05-06 02:53:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:53:10,420 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:53:10,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097187215] [2021-05-06 02:53:10,421 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 02:53:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:53:10,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:53:10,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:53:10,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:53:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:53:10,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:53:10,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769007755] [2021-05-06 02:53:10,698 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:53:10,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097187215] [2021-05-06 02:53:10,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097187215] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:53:10,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:53:10,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:53:10,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381930797] [2021-05-06 02:53:10,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:53:10,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:53:10,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:53:10,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:53:10,701 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:53:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:53:10,765 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 02:53:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:53:10,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 02:53:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:53:10,768 INFO L225 Difference]: With dead ends: 34 [2021-05-06 02:53:10,768 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 02:53:10,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:53:10,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 02:53:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 02:53:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:53:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-06 02:53:10,792 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2021-05-06 02:53:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:53:10,795 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-06 02:53:10,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:53:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-06 02:53:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 02:53:10,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:53:10,796 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:53:11,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:53:11,001 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:53:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:53:11,002 INFO L82 PathProgramCache]: Analyzing trace with hash 156588053, now seen corresponding path program 1 times [2021-05-06 02:53:11,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:53:11,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849735212] [2021-05-06 02:53:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:53:11,013 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:53:11,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638294671] [2021-05-06 02:53:11,013 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 02:53:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:53:11,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:53:11,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:53:11,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:53:11,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:53:11,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:53:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:53:11,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:53:11,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849735212] [2021-05-06 02:53:11,240 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:53:11,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638294671] [2021-05-06 02:53:11,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638294671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:53:11,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:53:11,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:53:11,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393473624] [2021-05-06 02:53:11,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:53:11,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:53:11,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:53:11,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:53:11,242 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:53:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:53:11,328 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-06 02:53:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:53:11,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 02:53:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:53:11,330 INFO L225 Difference]: With dead ends: 41 [2021-05-06 02:53:11,330 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 02:53:11,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:53:11,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 02:53:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 02:53:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:53:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-06 02:53:11,338 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 30 [2021-05-06 02:53:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:53:11,338 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-06 02:53:11,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:53:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-06 02:53:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 02:53:11,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:53:11,339 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:53:11,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:53:11,562 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:53:11,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:53:11,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1865789967, now seen corresponding path program 2 times [2021-05-06 02:53:11,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:53:11,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242934272] [2021-05-06 02:53:11,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:53:11,573 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:53:11,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043333331] [2021-05-06 02:53:11,573 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 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 02:53:11,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:53:11,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:53:11,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 02:53:11,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:53:11,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:53:11,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:53:11,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:53:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 02:53:11,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:53:11,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242934272] [2021-05-06 02:53:11,878 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:53:11,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043333331] [2021-05-06 02:53:11,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043333331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:53:11,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:53:11,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:53:11,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834876597] [2021-05-06 02:53:11,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:53:11,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:53:11,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:53:11,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:53:11,879 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:53:12,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:53:12,118 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-05-06 02:53:12,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:53:12,118 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-06 02:53:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:53:12,119 INFO L225 Difference]: With dead ends: 48 [2021-05-06 02:53:12,120 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 02:53:12,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:53:12,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 02:53:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 02:53:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 02:53:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-05-06 02:53:12,130 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 37 [2021-05-06 02:53:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:53:12,130 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-05-06 02:53:12,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:53:12,131 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-05-06 02:53:12,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:53:12,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:53:12,132 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:53:12,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:53:12,332 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:53:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:53:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1145718933, now seen corresponding path program 3 times [2021-05-06 02:53:12,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:53:12,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274690258] [2021-05-06 02:53:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:53:12,347 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:53:12,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720473654] [2021-05-06 02:53:12,347 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 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 02:53:12,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 02:53:12,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:53:12,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:53:12,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:53:12,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:53:12,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:53:12,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:53:12,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:53:12,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:53:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-06 02:53:12,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:53:12,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274690258] [2021-05-06 02:53:12,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:53:12,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720473654] [2021-05-06 02:53:12,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720473654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:53:12,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:53:12,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:53:12,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454658115] [2021-05-06 02:53:12,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:53:12,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:53:12,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:53:12,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:53:12,735 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5)