/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/ps5-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:00:49,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:00:49,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:00:49,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:00:49,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:00:49,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:00:49,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:00:49,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:00:49,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:00:49,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:00:49,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:00:49,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:00:49,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:00:49,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:00:49,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:00:49,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:00:49,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:00:49,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:00:49,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:00:49,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:00:49,160 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 17:00:49,188 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:00:49,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:00:49,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 17:00:49,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 17:00:49,191 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 17:00:49,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:00:49,191 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:00:49,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:00:49,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:00:49,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:00:49,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:00:49,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:00:49,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:00:49,192 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:00:49,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:00:49,193 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:00:49,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:00:49,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:00:49,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:00:49,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:00:49,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:00:49,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:00:49,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 17:00:49,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 17:00:49,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:00:49,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 17:00:49,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 17:00:49,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 17:00:49,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:00:49,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:00:49,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:00:49,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:00:49,530 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:00:49,531 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:00:49,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound2.c [2021-05-02 17:00:49,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e48aabb69/f54739712d244c2a8bea8f459805f229/FLAGe05ed4103 [2021-05-02 17:00:49,946 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:00:49,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound2.c [2021-05-02 17:00:49,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e48aabb69/f54739712d244c2a8bea8f459805f229/FLAGe05ed4103 [2021-05-02 17:00:49,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e48aabb69/f54739712d244c2a8bea8f459805f229 [2021-05-02 17:00:49,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:00:49,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 17:00:49,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:00:49,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:00:49,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:00:49,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:00:49" (1/1) ... [2021-05-02 17:00:49,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4717c70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:49, skipping insertion in model container [2021-05-02 17:00:49,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:00:49" (1/1) ... [2021-05-02 17:00:49,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:00:49,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:00:50,067 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/ps5-ll_unwindbound2.c[458,471] [2021-05-02 17:00:50,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:00:50,083 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:00:50,090 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/ps5-ll_unwindbound2.c[458,471] [2021-05-02 17:00:50,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:00:50,105 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:00:50,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:50 WrapperNode [2021-05-02 17:00:50,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:00:50,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:00:50,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:00:50,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:00:50,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:50" (1/1) ... [2021-05-02 17:00:50,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:50" (1/1) ... [2021-05-02 17:00:50,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:50" (1/1) ... [2021-05-02 17:00:50,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:50" (1/1) ... [2021-05-02 17:00:50,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:50" (1/1) ... [2021-05-02 17:00:50,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:50" (1/1) ... [2021-05-02 17:00:50,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:50" (1/1) ... [2021-05-02 17:00:50,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:00:50,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:00:50,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:00:50,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:00:50,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:00:50,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:00:50,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:00:50,208 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:00:50,209 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 17:00:50,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:00:50,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:00:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:00:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:00:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:00:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:00:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 17:00:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 17:00:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:00:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:00:50,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:00:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:00:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:00:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:00:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:00:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:00:50,460 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:00:50,460 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:00:50,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:00:50 BoogieIcfgContainer [2021-05-02 17:00:50,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:00:50,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:00:50,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:00:50,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:00:50,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:00:49" (1/3) ... [2021-05-02 17:00:50,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620b744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:00:50, skipping insertion in model container [2021-05-02 17:00:50,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:50" (2/3) ... [2021-05-02 17:00:50,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620b744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:00:50, skipping insertion in model container [2021-05-02 17:00:50,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:00:50" (3/3) ... [2021-05-02 17:00:50,483 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound2.c [2021-05-02 17:00:50,487 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:00:50,490 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:00:50,516 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:00:50,537 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:00:50,537 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 17:00:50,537 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 17:00:50,537 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:00:50,537 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:00:50,537 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:00:50,537 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:00:50,539 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:00:50,553 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) [2021-05-02 17:00:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:00:50,557 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:50,558 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:50,558 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:50,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:50,562 INFO L82 PathProgramCache]: Analyzing trace with hash 21872251, now seen corresponding path program 1 times [2021-05-02 17:00:50,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:50,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118651416] [2021-05-02 17:00:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:50,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:00:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:50,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:00:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:50,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:50,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118651416] [2021-05-02 17:00:50,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118651416] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:00:50,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:00:50,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:00:50,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988203970] [2021-05-02 17:00:50,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:00:50,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:50,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:00:50,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:00:50,802 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:00:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:50,857 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-05-02 17:00:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:00:50,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 17:00:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:50,864 INFO L225 Difference]: With dead ends: 50 [2021-05-02 17:00:50,864 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 17:00:50,867 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:00:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 17:00:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-02 17:00:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:00:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 17:00:50,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-02 17:00:50,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:50,908 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 17:00:50,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:00:50,908 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 17:00:50,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 17:00:50,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:50,909 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:50,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:00:50,910 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:50,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:50,910 INFO L82 PathProgramCache]: Analyzing trace with hash -119968982, now seen corresponding path program 1 times [2021-05-02 17:00:50,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:50,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889367628] [2021-05-02 17:00:50,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:50,921 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:50,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515003481] [2021-05-02 17:00:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:51,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 17:00:51,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:51,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:51,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:51,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:51,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:51,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:51,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:51,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889367628] [2021-05-02 17:00:51,100 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:51,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515003481] [2021-05-02 17:00:51,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515003481] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:00:51,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:00:51,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:00:51,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975057890] [2021-05-02 17:00:51,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:00:51,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:51,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:00:51,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:00:51,102 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:00:51,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:51,111 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 17:00:51,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:00:51,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 17:00:51,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:51,112 INFO L225 Difference]: With dead ends: 34 [2021-05-02 17:00:51,112 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 17:00:51,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:00:51,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 17:00:51,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 17:00:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:00:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 17:00:51,118 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-05-02 17:00:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:51,118 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 17:00:51,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:00:51,118 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 17:00:51,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 17:00:51,119 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:51,119 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:51,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 17:00:51,336 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:51,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:51,337 INFO L82 PathProgramCache]: Analyzing trace with hash -118181522, now seen corresponding path program 1 times [2021-05-02 17:00:51,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:51,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422454347] [2021-05-02 17:00:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:51,346 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:51,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145002021] [2021-05-02 17:00:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:51,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:00:51,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:51,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:51,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:51,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422454347] [2021-05-02 17:00:51,477 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:51,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145002021] [2021-05-02 17:00:51,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145002021] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:00:51,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:00:51,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 17:00:51,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153546678] [2021-05-02 17:00:51,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:00:51,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:51,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:00:51,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:00:51,479 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:00:51,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:51,563 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-02 17:00:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:00:51,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 17:00:51,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:51,565 INFO L225 Difference]: With dead ends: 36 [2021-05-02 17:00:51,565 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 17:00:51,566 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:00:51,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 17:00:51,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 17:00:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 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) [2021-05-02 17:00:51,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 17:00:51,575 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-02 17:00:51,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:51,575 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 17:00:51,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:00:51,576 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 17:00:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 17:00:51,576 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:51,577 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:51,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:51,794 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:51,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:51,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1364840471, now seen corresponding path program 1 times [2021-05-02 17:00:51,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:51,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949633923] [2021-05-02 17:00:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:51,803 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:51,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523416519] [2021-05-02 17:00:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:51,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 17:00:51,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:51,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:51,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:51,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:51,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:51,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:51,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:51,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:51,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:52,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:52,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949633923] [2021-05-02 17:00:52,006 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:52,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523416519] [2021-05-02 17:00:52,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523416519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:52,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:52,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 17:00:52,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736910957] [2021-05-02 17:00:52,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 17:00:52,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:52,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 17:00:52,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:00:52,007 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:00:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:52,043 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-02 17:00:52,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:00:52,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-02 17:00:52,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:52,044 INFO L225 Difference]: With dead ends: 42 [2021-05-02 17:00:52,044 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 17:00:52,045 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:00:52,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 17:00:52,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 17:00:52,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-05-02 17:00:52,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 17:00:52,049 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-02 17:00:52,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:52,050 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 17:00:52,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:00:52,050 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 17:00:52,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 17:00:52,050 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:52,050 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:52,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:52,251 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:52,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1363053011, now seen corresponding path program 1 times [2021-05-02 17:00:52,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:52,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21355765] [2021-05-02 17:00:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:52,259 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:52,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668582583] [2021-05-02 17:00:52,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:52,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:00:52,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:52,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:52,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:52,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21355765] [2021-05-02 17:00:52,453 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:52,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668582583] [2021-05-02 17:00:52,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668582583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:52,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:52,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:00:52,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107734189] [2021-05-02 17:00:52,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:00:52,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:52,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:00:52,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:00:52,455 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:00:52,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:52,544 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-05-02 17:00:52,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:00:52,545 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 17:00:52,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:52,548 INFO L225 Difference]: With dead ends: 44 [2021-05-02 17:00:52,548 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 17:00:52,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:00:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 17:00:52,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 17:00:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 17:00:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-02 17:00:52,570 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2021-05-02 17:00:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:52,570 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-02 17:00:52,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:00:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-02 17:00:52,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 17:00:52,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:52,572 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:52,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:52,775 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:52,776 INFO L82 PathProgramCache]: Analyzing trace with hash -595737176, now seen corresponding path program 2 times [2021-05-02 17:00:52,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:52,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312168930] [2021-05-02 17:00:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:52,785 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:52,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668409185] [2021-05-02 17:00:52,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:52,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:00:52,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:00:52,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 17:00:52,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:00:54,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:54,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312168930] [2021-05-02 17:00:54,461 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:54,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668409185] [2021-05-02 17:00:54,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668409185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:54,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:54,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:00:54,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709322413] [2021-05-02 17:00:54,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:00:54,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:54,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:00:54,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:00:54,462 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 17:00:54,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:54,600 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-05-02 17:00:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:00:54,609 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 17:00:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:54,610 INFO L225 Difference]: With dead ends: 54 [2021-05-02 17:00:54,610 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 17:00:54,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1396.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:00:54,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 17:00:54,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-05-02 17:00:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:00:54,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-05-02 17:00:54,616 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 34 [2021-05-02 17:00:54,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:54,616 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-05-02 17:00:54,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 17:00:54,617 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-05-02 17:00:54,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 17:00:54,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:54,618 INFO L523 BasicCegarLoop]: trace histogram [4, 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] [2021-05-02 17:00:54,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 17:00:54,824 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:54,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:54,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1559147673, now seen corresponding path program 1 times [2021-05-02 17:00:54,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:54,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784595255] [2021-05-02 17:00:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:54,832 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:54,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569450312] [2021-05-02 17:00:54,833 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 [2021-05-02 17:00:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:54,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 17:00:54,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:54,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 17:00:55,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:55,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784595255] [2021-05-02 17:00:55,043 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:55,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569450312] [2021-05-02 17:00:55,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569450312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:55,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:55,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 17:00:55,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008592157] [2021-05-02 17:00:55,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:00:55,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:55,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:00:55,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:00:55,045 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 17:00:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:55,139 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-05-02 17:00:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:00:55,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-02 17:00:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:55,141 INFO L225 Difference]: With dead ends: 57 [2021-05-02 17:00:55,141 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 17:00:55,142 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:00:55,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 17:00:55,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 17:00:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 17:00:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-05-02 17:00:55,147 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 37 [2021-05-02 17:00:55,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:55,148 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-05-02 17:00:55,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 17:00:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-05-02 17:00:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 17:00:55,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:55,149 INFO L523 BasicCegarLoop]: trace histogram [4, 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] [2021-05-02 17:00:55,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:55,350 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:55,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:55,350 INFO L82 PathProgramCache]: Analyzing trace with hash -951509150, now seen corresponding path program 1 times [2021-05-02 17:00:55,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:55,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254683745] [2021-05-02 17:00:55,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:55,358 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:55,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141196148] [2021-05-02 17:00:55,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 17:00:55,504 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 17:00:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 17:00:55,538 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 17:00:55,571 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 17:00:55,572 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 17:00:55,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:55,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:00:55 BoogieIcfgContainer [2021-05-02 17:00:55,804 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:00:55,804 INFO L168 Benchmark]: Toolchain (without parser) took 5843.35 ms. Allocated memory was 192.9 MB in the beginning and 273.7 MB in the end (delta: 80.7 MB). Free memory was 156.8 MB in the beginning and 161.8 MB in the end (delta: -5.0 MB). Peak memory consumption was 76.7 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:55,804 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 192.9 MB. Free memory is still 173.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:00:55,804 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.57 ms. Allocated memory is still 192.9 MB. Free memory was 156.6 MB in the beginning and 146.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:55,805 INFO L168 Benchmark]: Boogie Preprocessor took 49.21 ms. Allocated memory is still 192.9 MB. Free memory was 146.5 MB in the beginning and 176.0 MB in the end (delta: -29.5 MB). Peak memory consumption was 2.3 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:55,805 INFO L168 Benchmark]: RCFGBuilder took 305.19 ms. Allocated memory is still 192.9 MB. Free memory was 176.0 MB in the beginning and 160.6 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:55,805 INFO L168 Benchmark]: TraceAbstraction took 5341.52 ms. Allocated memory was 192.9 MB in the beginning and 273.7 MB in the end (delta: 80.7 MB). Free memory was 160.1 MB in the beginning and 161.8 MB in the end (delta: -1.6 MB). Peak memory consumption was 80.7 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:55,805 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 192.9 MB. Free memory is still 173.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 143.57 ms. Allocated memory is still 192.9 MB. Free memory was 156.6 MB in the beginning and 146.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.21 ms. Allocated memory is still 192.9 MB. Free memory was 146.5 MB in the beginning and 176.0 MB in the end (delta: -29.5 MB). Peak memory consumption was 2.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 305.19 ms. Allocated memory is still 192.9 MB. Free memory was 176.0 MB in the beginning and 160.6 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5341.52 ms. Allocated memory was 192.9 MB in the beginning and 273.7 MB in the end (delta: 80.7 MB). Free memory was 160.1 MB in the beginning and 161.8 MB in the end (delta: -1.6 MB). Peak memory consumption was 80.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=15, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L22] CALL assume_abort_if_not(k <= 256) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L7] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L22] RET assume_abort_if_not(k <= 256) VAL [\old(counter)=0, counter=0, k=3] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=3, x=0, y=0] [L28] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=3, x=0, y=0] [L28] COND TRUE counter++<2 [L29] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L29] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(counter)=0, c=0, counter=1, k=3, x=0, y=0] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=3, x=1, y=1] [L28] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=3, x=1, y=1] [L28] COND TRUE counter++<2 [L29] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L29] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(counter)=0, c=1, counter=2, k=3, x=1, y=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [\old(counter)=0, c=2, counter=2, k=3, x=17, y=2] [L28] EXPR counter++ VAL [\old(counter)=0, c=2, counter=3, counter++=2, k=3, x=17, y=2] [L28] COND FALSE !(counter++<2) [L39] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L39] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(counter)=0, c=2, counter=3, k=3, x=17, y=2] [L40] CALL __VERIFIER_assert(k*y == y*y) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5237.5ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 13.0ms, AutomataDifference: 550.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 190 SDtfs, 64 SDslu, 681 SDs, 0 SdLazy, 333 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 250.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 170 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1627.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 79.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 68.9ms SsaConstructionTime, 480.6ms SatisfiabilityAnalysisTime, 2187.8ms InterpolantComputationTime, 215 NumberOfCodeBlocks, 215 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 169 ConstructedInterpolants, 0 QuantifiedInterpolants, 598 SizeOfPredicates, 15 NumberOfNonLiveVariables, 808 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 28/47 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...