/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/ps4-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:53:55,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:53:55,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:53:55,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:53:55,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:53:55,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:53:55,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:53:55,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:53:55,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:53:55,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:53:55,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:53:55,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:53:55,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:53:55,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:53:55,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:53:55,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:53:55,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:53:55,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:53:55,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:53:55,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:53:55,700 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 16:53:55,747 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:53:55,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:53:55,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:53:55,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:53:55,750 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:53:55,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:53:55,751 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:53:55,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:53:55,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:53:55,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:53:55,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:53:55,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:53:55,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:53:55,752 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:53:55,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:53:55,753 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:53:55,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:53:55,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:53:55,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:53:55,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:53:55,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:53:55,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:53:55,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:53:55,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:53:55,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:53:55,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:53:55,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:53:55,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:53:55,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:53:56,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:53:56,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:53:56,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:53:56,063 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:53:56,064 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:53:56,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound2.c [2021-05-02 16:53:56,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ee85d6d/a14cb353462f48508154346e86c6818a/FLAGe4ef80b00 [2021-05-02 16:53:56,543 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:53:56,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound2.c [2021-05-02 16:53:56,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ee85d6d/a14cb353462f48508154346e86c6818a/FLAGe4ef80b00 [2021-05-02 16:53:56,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ee85d6d/a14cb353462f48508154346e86c6818a [2021-05-02 16:53:56,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:53:56,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:53:56,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:53:56,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:53:56,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:53:56,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:53:56" (1/1) ... [2021-05-02 16:53:56,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46de04cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:53:56, skipping insertion in model container [2021-05-02 16:53:56,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:53:56" (1/1) ... [2021-05-02 16:53:56,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:53:56,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:53:57,117 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/ps4-ll_unwindbound2.c[458,471] [2021-05-02 16:53:57,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:53:57,142 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:53:57,151 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/ps4-ll_unwindbound2.c[458,471] [2021-05-02 16:53:57,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:53:57,166 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:53:57,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:53:57 WrapperNode [2021-05-02 16:53:57,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:53:57,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:53:57,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:53:57,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:53:57,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:53:57" (1/1) ... [2021-05-02 16:53:57,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:53:57" (1/1) ... [2021-05-02 16:53:57,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:53:57" (1/1) ... [2021-05-02 16:53:57,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:53:57" (1/1) ... [2021-05-02 16:53:57,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:53:57" (1/1) ... [2021-05-02 16:53:57,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:53:57" (1/1) ... [2021-05-02 16:53:57,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:53:57" (1/1) ... [2021-05-02 16:53:57,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:53:57,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:53:57,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:53:57,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:53:57,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:53:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:53:57,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:53:57,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:53:57,288 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:53:57,288 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:53:57,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:53:57,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:53:57,288 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:53:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:53:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:53:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:53:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 16:53:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:53:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:53:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:53:57,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:53:57,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:53:57,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:53:57,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:53:57,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:53:57,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:53:57,482 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:53:57,482 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:53:57,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:53:57 BoogieIcfgContainer [2021-05-02 16:53:57,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:53:57,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:53:57,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:53:57,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:53:57,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:53:56" (1/3) ... [2021-05-02 16:53:57,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304b2ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:53:57, skipping insertion in model container [2021-05-02 16:53:57,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:53:57" (2/3) ... [2021-05-02 16:53:57,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304b2ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:53:57, skipping insertion in model container [2021-05-02 16:53:57,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:53:57" (3/3) ... [2021-05-02 16:53:57,490 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound2.c [2021-05-02 16:53:57,495 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:53:57,499 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:53:57,514 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:53:57,533 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:53:57,533 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:53:57,533 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:53:57,533 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:53:57,533 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:53:57,533 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:53:57,533 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:53:57,534 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:53:57,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:53:57,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 16:53:57,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:57,552 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:57,552 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:57,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:57,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times [2021-05-02 16:53:57,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:57,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654284443] [2021-05-02 16:53:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:53:57,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:53:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:53:57,851 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 16:53:57,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:57,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654284443] [2021-05-02 16:53:57,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654284443] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:53:57,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:53:57,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:53:57,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424589271] [2021-05-02 16:53:57,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:53:57,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:57,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:53:57,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:53:57,874 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:53:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:57,966 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-05-02 16:53:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:53:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 16:53:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:57,974 INFO L225 Difference]: With dead ends: 41 [2021-05-02 16:53:57,975 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 16:53:57,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:53:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 16:53:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-02 16:53:58,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:53:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-02 16:53:58,018 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-02 16:53:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:58,018 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-02 16:53:58,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:53:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-02 16:53:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 16:53:58,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:58,020 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:58,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:53:58,020 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times [2021-05-02 16:53:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:58,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558828600] [2021-05-02 16:53:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:58,058 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:58,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180965366] [2021-05-02 16:53:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:53:58,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:53:58,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:58,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,261 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 16:53:58,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:58,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558828600] [2021-05-02 16:53:58,262 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:58,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180965366] [2021-05-02 16:53:58,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180965366] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:53:58,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:53:58,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:53:58,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889429452] [2021-05-02 16:53:58,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:53:58,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:58,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:53:58,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:53:58,267 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:53:58,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:58,284 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-02 16:53:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:53:58,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 16:53:58,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:58,285 INFO L225 Difference]: With dead ends: 28 [2021-05-02 16:53:58,286 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 16:53:58,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:53:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 16:53:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 16:53:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:53:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-02 16:53:58,291 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-02 16:53:58,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:58,292 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-02 16:53:58,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:53:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-02 16:53:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 16:53:58,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:58,293 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:58,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:53:58,514 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:58,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:58,515 INFO L82 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 1 times [2021-05-02 16:53:58,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:58,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632500667] [2021-05-02 16:53:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:58,527 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:58,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720940467] [2021-05-02 16:53:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:53:58,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 16:53:58,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:58,618 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 16:53:58,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:58,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632500667] [2021-05-02 16:53:58,618 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:58,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720940467] [2021-05-02 16:53:58,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720940467] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:53:58,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:53:58,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 16:53:58,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884324070] [2021-05-02 16:53:58,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:53:58,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:58,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:53:58,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:53:58,620 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:53:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:58,659 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-05-02 16:53:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 16:53:58,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 16:53:58,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:58,661 INFO L225 Difference]: With dead ends: 30 [2021-05-02 16:53:58,661 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 16:53:58,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:53:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 16:53:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 16:53:58,667 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 16:53:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 16:53:58,668 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-02 16:53:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:58,669 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 16:53:58,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 16:53:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 16:53:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 16:53:58,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:58,670 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:58,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:58,885 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:58,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:58,885 INFO L82 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 1 times [2021-05-02 16:53:58,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:58,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954307289] [2021-05-02 16:53:58,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:58,901 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:58,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488023243] [2021-05-02 16:53:58,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:53:58,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:53:58,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:58,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:58,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:53:59,072 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 16:53:59,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:59,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954307289] [2021-05-02 16:53:59,073 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:59,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488023243] [2021-05-02 16:53:59,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488023243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:59,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:59,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:53:59,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152504470] [2021-05-02 16:53:59,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:53:59,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:59,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:53:59,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:53:59,075 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:53:59,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:53:59,112 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-02 16:53:59,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:53:59,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 16:53:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:53:59,114 INFO L225 Difference]: With dead ends: 36 [2021-05-02 16:53:59,114 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 16:53:59,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:53:59,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 16:53:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 16:53:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:53:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 16:53:59,125 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-02 16:53:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:53:59,126 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 16:53:59,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:53:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 16:53:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 16:53:59,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:53:59,127 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:53:59,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:59,341 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:53:59,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:53:59,341 INFO L82 PathProgramCache]: Analyzing trace with hash -261798320, now seen corresponding path program 1 times [2021-05-02 16:53:59,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:53:59,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479714770] [2021-05-02 16:53:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:53:59,361 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:53:59,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064720286] [2021-05-02 16:53:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:53:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:53:59,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:53:59,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:53:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:53:59,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:53:59,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479714770] [2021-05-02 16:53:59,523 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:53:59,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064720286] [2021-05-02 16:53:59,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064720286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:53:59,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:53:59,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:53:59,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858346326] [2021-05-02 16:53:59,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:53:59,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:53:59,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:53:59,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:53:59,525 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:57:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:57:13,388 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-02 16:57:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:57:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 16:57:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:57:13,390 INFO L225 Difference]: With dead ends: 38 [2021-05-02 16:57:13,390 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 16:57:13,390 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:57:13,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 16:57:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 16:57:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:57:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 16:57:13,394 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-02 16:57:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:57:13,394 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 16:57:13,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:57:13,395 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 16:57:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 16:57:13,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:57:13,395 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:57:13,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:57:13,596 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:57:13,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:57:13,596 INFO L82 PathProgramCache]: Analyzing trace with hash 891414954, now seen corresponding path program 1 times [2021-05-02 16:57:13,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:57:13,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887857321] [2021-05-02 16:57:13,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:57:13,613 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:57:13,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927783885] [2021-05-02 16:57:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:57:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:57:13,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 16:57:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:57:13,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:57:13,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:57:13,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:57:13,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:57:13,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:57:13,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:57:13,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:57:13,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:57:13,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:57:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:57:13,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:57:13,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887857321] [2021-05-02 16:57:13,793 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:57:13,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927783885] [2021-05-02 16:57:13,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927783885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:57:13,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:57:13,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:57:13,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721827990] [2021-05-02 16:57:13,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:57:13,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:57:13,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:57:13,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:57:13,795 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:57:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:57:13,892 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-02 16:57:13,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:57:13,893 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-02 16:57:13,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:57:13,893 INFO L225 Difference]: With dead ends: 41 [2021-05-02 16:57:13,894 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 16:57:13,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:57:13,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 16:57:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 16:57:13,902 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 16:57:13,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 16:57:13,903 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-02 16:57:13,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:57:13,904 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 16:57:13,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:57:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 16:57:13,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:57:13,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:57:13,905 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:57:14,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 16:57:14,121 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:57:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:57:14,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1647059121, now seen corresponding path program 2 times [2021-05-02 16:57:14,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:57:14,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246985883] [2021-05-02 16:57:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:57:14,134 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:57:14,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920558415] [2021-05-02 16:57:14,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:57:14,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:57:14,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 16:57:14,196 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 16:57:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 16:57:14,213 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 16:57:14,261 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 16:57:14,261 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 16:57:14,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:57:14,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 04:57:14 BoogieIcfgContainer [2021-05-02 16:57:14,489 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 16:57:14,490 INFO L168 Benchmark]: Toolchain (without parser) took 197529.05 ms. Allocated memory was 185.6 MB in the beginning and 223.3 MB in the end (delta: 37.7 MB). Free memory was 150.6 MB in the beginning and 189.2 MB in the end (delta: -38.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 16:57:14,490 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 185.6 MB. Free memory is still 166.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 16:57:14,490 INFO L168 Benchmark]: CACSL2BoogieTranslator took 202.44 ms. Allocated memory is still 185.6 MB. Free memory was 150.4 MB in the beginning and 140.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 16:57:14,490 INFO L168 Benchmark]: Boogie Preprocessor took 59.15 ms. Allocated memory is still 185.6 MB. Free memory was 140.6 MB in the beginning and 169.8 MB in the end (delta: -29.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-02 16:57:14,490 INFO L168 Benchmark]: RCFGBuilder took 255.67 ms. Allocated memory is still 185.6 MB. Free memory was 169.8 MB in the beginning and 154.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 16:57:14,490 INFO L168 Benchmark]: TraceAbstraction took 197004.62 ms. Allocated memory was 185.6 MB in the beginning and 223.3 MB in the end (delta: 37.7 MB). Free memory was 154.0 MB in the beginning and 189.2 MB in the end (delta: -35.2 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. [2021-05-02 16:57:14,491 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 185.6 MB. Free memory is still 166.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 202.44 ms. Allocated memory is still 185.6 MB. Free memory was 150.4 MB in the beginning and 140.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.15 ms. Allocated memory is still 185.6 MB. Free memory was 140.6 MB in the beginning and 169.8 MB in the end (delta: -29.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 255.67 ms. Allocated memory is still 185.6 MB. Free memory was 169.8 MB in the beginning and 154.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 197004.62 ms. Allocated memory was 185.6 MB in the beginning and 223.3 MB in the end (delta: 37.7 MB). Free memory was 154.0 MB in the beginning and 189.2 MB in the end (delta: -35.2 MB). Peak memory consumption was 3.6 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)=5, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=3, x=0, y=0] [L27] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=3, x=0, y=0] [L27] COND TRUE counter++<2 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*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] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=0, counter=1, k=3, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=3, x=1, y=1] [L27] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=3, x=1, y=1] [L27] COND TRUE counter++<2 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*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] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=1, counter=2, k=3, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=2, counter=2, k=3, x=9, y=2] [L27] EXPR counter++ VAL [\old(counter)=0, c=2, counter=3, counter++=2, k=3, x=9, y=2] [L27] COND FALSE !(counter++<2) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) 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, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 196931.5ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 10.9ms, AutomataDifference: 194188.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 36 SDslu, 324 SDs, 0 SdLazy, 214 SolverSat, 13 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 193958.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 207.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=5, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 59.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 73.5ms SsaConstructionTime, 191.6ms SatisfiabilityAnalysisTime, 672.8ms InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 334 SizeOfPredicates, 10 NumberOfNonLiveVariables, 598 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 7/21 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...