/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/egcd-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:48:11,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:48:11,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:48:11,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:48:11,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:48:11,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:48:11,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:48:11,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:48:11,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:48:11,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:48:11,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:48:11,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:48:11,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:48:11,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:48:11,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:48:11,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:48:11,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:48:11,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:48:11,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:48:11,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:48:11,260 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 14:48:11,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:48:11,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:48:11,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:48:11,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:48:11,303 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:48:11,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:48:11,303 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:48:11,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:48:11,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:48:11,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:48:11,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:48:11,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:48:11,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:48:11,304 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:48:11,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:48:11,304 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:48:11,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:48:11,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:48:11,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:48:11,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:48:11,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:48:11,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:48:11,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:48:11,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:48:11,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:48:11,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:48:11,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:48:11,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:48:11,305 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:48:11,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:48:11,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:48:11,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:48:11,563 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:48:11,563 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:48:11,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c [2021-05-02 14:48:11,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed1b54cde/4c190b44181e4f4bbdd2f137b22dd4f0/FLAGd234ded93 [2021-05-02 14:48:11,995 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:48:11,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c [2021-05-02 14:48:12,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed1b54cde/4c190b44181e4f4bbdd2f137b22dd4f0/FLAGd234ded93 [2021-05-02 14:48:12,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed1b54cde/4c190b44181e4f4bbdd2f137b22dd4f0 [2021-05-02 14:48:12,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:48:12,017 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:48:12,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:48:12,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:48:12,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:48:12,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:48:12" (1/1) ... [2021-05-02 14:48:12,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b59104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:12, skipping insertion in model container [2021-05-02 14:48:12,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:48:12" (1/1) ... [2021-05-02 14:48:12,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:48:12,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:48:12,130 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/egcd-ll_valuebound2.c[489,502] [2021-05-02 14:48:12,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:48:12,145 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:48:12,162 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/egcd-ll_valuebound2.c[489,502] [2021-05-02 14:48:12,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:48:12,190 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:48:12,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:12 WrapperNode [2021-05-02 14:48:12,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:48:12,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:48:12,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:48:12,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:48:12,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:12" (1/1) ... [2021-05-02 14:48:12,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:12" (1/1) ... [2021-05-02 14:48:12,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:12" (1/1) ... [2021-05-02 14:48:12,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:12" (1/1) ... [2021-05-02 14:48:12,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:12" (1/1) ... [2021-05-02 14:48:12,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:12" (1/1) ... [2021-05-02 14:48:12,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:12" (1/1) ... [2021-05-02 14:48:12,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:48:12,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:48:12,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:48:12,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:48:12,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:12" (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 14:48:12,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:48:12,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:48:12,263 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:48:12,263 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:48:12,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:48:12,263 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:48:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:48:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:48:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:48:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:48:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:48:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:48:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:48:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:48:12,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:48:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:48:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:48:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:48:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:48:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:48:12,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:48:12,499 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 14:48:12,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:48:12 BoogieIcfgContainer [2021-05-02 14:48:12,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:48:12,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:48:12,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:48:12,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:48:12,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:48:12" (1/3) ... [2021-05-02 14:48:12,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bdbb0b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:48:12, skipping insertion in model container [2021-05-02 14:48:12,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:12" (2/3) ... [2021-05-02 14:48:12,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bdbb0b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:48:12, skipping insertion in model container [2021-05-02 14:48:12,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:48:12" (3/3) ... [2021-05-02 14:48:12,504 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound2.c [2021-05-02 14:48:12,508 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:48:12,511 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:48:12,523 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:48:12,538 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:48:12,538 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:48:12,538 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:48:12,538 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:48:12,538 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:48:12,539 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:48:12,539 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:48:12,539 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:48:12,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 14:48:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:48:12,557 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:12,558 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:12,558 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:12,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:12,566 INFO L82 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2021-05-02 14:48:12,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:12,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117004407] [2021-05-02 14:48:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:12,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:48:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:12,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:48:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:12,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:48:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:12,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:48:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:12,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:48:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:48:12,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:12,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117004407] [2021-05-02 14:48:12,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117004407] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:48:12,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:48:12,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:48:12,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822934031] [2021-05-02 14:48:12,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:48:12,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:12,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:48:12,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:48:12,812 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:48:12,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:12,997 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-05-02 14:48:12,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:48:12,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 14:48:12,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:13,004 INFO L225 Difference]: With dead ends: 67 [2021-05-02 14:48:13,004 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 14:48:13,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:48:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 14:48:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 14:48:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:48:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 14:48:13,061 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-02 14:48:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:13,061 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 14:48:13,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:48:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 14:48:13,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:48:13,062 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:13,062 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:13,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:48:13,063 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:13,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2021-05-02 14:48:13,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:13,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680392022] [2021-05-02 14:48:13,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:13,103 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:13,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986000228] [2021-05-02 14:48:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:48:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:13,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:48:13,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:13,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:48:13,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:13,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680392022] [2021-05-02 14:48:13,336 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:13,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986000228] [2021-05-02 14:48:13,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986000228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:13,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:13,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:48:13,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297395227] [2021-05-02 14:48:13,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:48:13,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:13,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:48:13,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:48:13,338 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 14:48:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:13,471 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-05-02 14:48:13,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:48:13,472 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-02 14:48:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:13,476 INFO L225 Difference]: With dead ends: 48 [2021-05-02 14:48:13,476 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 14:48:13,478 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:48:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 14:48:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 14:48:13,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:48:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-02 14:48:13,505 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-02 14:48:13,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:13,505 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-02 14:48:13,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 14:48:13,506 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-02 14:48:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 14:48:13,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:13,510 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:13,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:48:13,711 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:13,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:13,711 INFO L82 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2021-05-02 14:48:13,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:13,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134008355] [2021-05-02 14:48:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:13,723 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:13,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104309129] [2021-05-02 14:48:13,723 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 14:48:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:13,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:48:13,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:13,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:13,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:48:14,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:14,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134008355] [2021-05-02 14:48:14,030 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:14,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104309129] [2021-05-02 14:48:14,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104309129] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:48:14,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:48:14,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 14:48:14,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317102096] [2021-05-02 14:48:14,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:48:14,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:14,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:48:14,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:48:14,033 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 14:48:14,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:14,191 INFO L93 Difference]: Finished difference Result 70 states and 102 transitions. [2021-05-02 14:48:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:48:14,191 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2021-05-02 14:48:14,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:14,193 INFO L225 Difference]: With dead ends: 70 [2021-05-02 14:48:14,193 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 14:48:14,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:48:14,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 14:48:14,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-02 14:48:14,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 14:48:14,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-02 14:48:14,205 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-02 14:48:14,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:14,205 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-02 14:48:14,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 14:48:14,205 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-02 14:48:14,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:48:14,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:14,206 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:14,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:14,421 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:14,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2021-05-02 14:48:14,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:14,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915663383] [2021-05-02 14:48:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:14,432 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:14,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467318005] [2021-05-02 14:48:14,433 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 14:48:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:14,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:48:14,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:14,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:48:14,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:14,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915663383] [2021-05-02 14:48:14,688 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:14,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467318005] [2021-05-02 14:48:14,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467318005] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:48:14,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:48:14,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 14:48:14,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271580343] [2021-05-02 14:48:14,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:48:14,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:14,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:48:14,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:48:14,689 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 14:48:14,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:14,805 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-05-02 14:48:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:48:14,805 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2021-05-02 14:48:14,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:14,806 INFO L225 Difference]: With dead ends: 68 [2021-05-02 14:48:14,806 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 14:48:14,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:48:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 14:48:14,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 14:48:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:48:14,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-02 14:48:14,815 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-02 14:48:14,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:14,815 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-02 14:48:14,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 14:48:14,815 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-02 14:48:14,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 14:48:14,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:14,816 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:15,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:15,029 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:15,029 INFO L82 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2021-05-02 14:48:15,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:15,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331400856] [2021-05-02 14:48:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:15,039 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:15,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183086748] [2021-05-02 14:48:15,040 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 14:48:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:15,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 14:48:15,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:48:15,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:15,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331400856] [2021-05-02 14:48:15,145 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:15,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183086748] [2021-05-02 14:48:15,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183086748] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:48:15,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:48:15,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:48:15,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437498172] [2021-05-02 14:48:15,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:48:15,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:15,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:48:15,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:48:15,146 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 14:48:15,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:15,188 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-05-02 14:48:15,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:48:15,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-02 14:48:15,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:15,190 INFO L225 Difference]: With dead ends: 70 [2021-05-02 14:48:15,190 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 14:48:15,190 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:48:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 14:48:15,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 14:48:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:48:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-02 14:48:15,198 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-02 14:48:15,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:15,198 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-02 14:48:15,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 14:48:15,199 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-02 14:48:15,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 14:48:15,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:15,199 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:15,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:15,409 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:15,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:15,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1107651435, now seen corresponding path program 1 times [2021-05-02 14:48:15,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:15,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653486245] [2021-05-02 14:48:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:15,418 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:15,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463076273] [2021-05-02 14:48:15,418 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 14:48:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:15,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:48:15,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:15,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 14:48:15,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:15,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653486245] [2021-05-02 14:48:15,560 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:15,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463076273] [2021-05-02 14:48:15,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463076273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:15,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:15,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:48:15,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924571048] [2021-05-02 14:48:15,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:48:15,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:15,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:48:15,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:48:15,562 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 14:48:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:15,623 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-05-02 14:48:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:48:15,624 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-02 14:48:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:15,625 INFO L225 Difference]: With dead ends: 84 [2021-05-02 14:48:15,625 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 14:48:15,625 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:48:15,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 14:48:15,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-02 14:48:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 14:48:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 14:48:15,633 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-02 14:48:15,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:15,634 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 14:48:15,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 14:48:15,634 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 14:48:15,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 14:48:15,634 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:15,635 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:15,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:48:15,849 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:15,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2021-05-02 14:48:15,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:15,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932239360] [2021-05-02 14:48:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:15,857 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:15,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081616306] [2021-05-02 14:48:15,858 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 14:48:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:15,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 14:48:15,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:16,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:48:16,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:16,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932239360] [2021-05-02 14:48:16,036 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:16,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081616306] [2021-05-02 14:48:16,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081616306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:16,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:16,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:48:16,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194613358] [2021-05-02 14:48:16,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:48:16,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:16,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:48:16,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:48:16,037 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:48:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:16,152 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2021-05-02 14:48:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:48:16,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-02 14:48:16,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:16,154 INFO L225 Difference]: With dead ends: 88 [2021-05-02 14:48:16,154 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 14:48:16,155 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:48:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 14:48:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 14:48:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 14:48:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-02 14:48:16,174 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-02 14:48:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:16,174 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-02 14:48:16,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:48:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-02 14:48:16,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 14:48:16,178 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:16,179 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:16,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:16,393 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 1 times [2021-05-02 14:48:16,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:16,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384425955] [2021-05-02 14:48:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:16,401 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:16,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873997849] [2021-05-02 14:48:16,401 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 14:48:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:16,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 14:48:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:16,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:48:16,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:16,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384425955] [2021-05-02 14:48:16,678 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:16,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873997849] [2021-05-02 14:48:16,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873997849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:16,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:16,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:48:16,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242618508] [2021-05-02 14:48:16,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:48:16,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:16,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:48:16,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:48:16,679 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:48:16,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:16,817 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2021-05-02 14:48:16,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:48:16,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-02 14:48:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:16,818 INFO L225 Difference]: With dead ends: 110 [2021-05-02 14:48:16,818 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 14:48:16,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:48:16,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 14:48:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2021-05-02 14:48:16,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 61 states have internal predecessors, (68), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 14:48:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 132 transitions. [2021-05-02 14:48:16,829 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 132 transitions. Word has length 56 [2021-05-02 14:48:16,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:16,829 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 132 transitions. [2021-05-02 14:48:16,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:48:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 132 transitions. [2021-05-02 14:48:16,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:48:16,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:16,830 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:17,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:17,051 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:17,051 INFO L82 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2021-05-02 14:48:17,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:17,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580536284] [2021-05-02 14:48:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:17,066 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:17,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020076337] [2021-05-02 14:48:17,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:17,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:48:17,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:17,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 14:48:17,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:17,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-02 14:48:17,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:17,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580536284] [2021-05-02 14:48:17,437 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:17,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020076337] [2021-05-02 14:48:17,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020076337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:17,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:17,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:48:17,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308026539] [2021-05-02 14:48:17,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:48:17,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:17,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:48:17,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:48:17,440 INFO L87 Difference]: Start difference. First operand 104 states and 132 transitions. Second operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 14:48:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:17,676 INFO L93 Difference]: Finished difference Result 164 states and 201 transitions. [2021-05-02 14:48:17,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:48:17,677 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 61 [2021-05-02 14:48:17,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:17,678 INFO L225 Difference]: With dead ends: 164 [2021-05-02 14:48:17,678 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 14:48:17,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:48:17,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 14:48:17,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 14:48:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 57 states have internal predecessors, (62), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 14:48:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2021-05-02 14:48:17,686 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 61 [2021-05-02 14:48:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:17,686 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2021-05-02 14:48:17,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 14:48:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2021-05-02 14:48:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:48:17,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:17,687 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:17,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:48:17,902 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:17,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:17,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2021-05-02 14:48:17,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:17,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634461429] [2021-05-02 14:48:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:17,910 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:17,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706648093] [2021-05-02 14:48:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:17,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 14:48:17,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:17,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:17,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 14:48:18,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:18,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634461429] [2021-05-02 14:48:18,106 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:18,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706648093] [2021-05-02 14:48:18,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706648093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:18,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:18,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:48:18,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304157701] [2021-05-02 14:48:18,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:48:18,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:18,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:48:18,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:48:18,107 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:48:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:18,197 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2021-05-02 14:48:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:48:18,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 14:48:18,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:18,198 INFO L225 Difference]: With dead ends: 101 [2021-05-02 14:48:18,198 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 14:48:18,199 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:48:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 14:48:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-05-02 14:48:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.027027027027027) internal successors, (38), 38 states have internal predecessors, (38), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 14:48:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-05-02 14:48:18,204 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 69 [2021-05-02 14:48:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:18,204 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-05-02 14:48:18,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:48:18,205 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-05-02 14:48:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:48:18,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:18,205 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:18,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:18,425 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:18,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:18,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 2 times [2021-05-02 14:48:18,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:18,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584651820] [2021-05-02 14:48:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:18,433 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:18,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855717343] [2021-05-02 14:48:18,433 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:18,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:48:18,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:18,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 14:48:18,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:18,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-05-02 14:48:18,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:18,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584651820] [2021-05-02 14:48:18,621 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:18,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855717343] [2021-05-02 14:48:18,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855717343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:18,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:18,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:48:18,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295784470] [2021-05-02 14:48:18,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:48:18,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:18,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:48:18,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:48:18,623 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:48:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:18,687 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-05-02 14:48:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:48:18,688 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-02 14:48:18,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:18,688 INFO L225 Difference]: With dead ends: 72 [2021-05-02 14:48:18,688 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:48:18,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:48:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:48:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:48:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 14:48:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:48:18,689 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2021-05-02 14:48:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:18,690 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:48:18,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:48:18,690 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:48:18,690 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:48:18,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:18,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:48:19,123 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-05-02 14:48:19,243 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-05-02 14:48:19,368 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-05-02 14:48:19,511 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 33 [2021-05-02 14:48:19,706 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2021-05-02 14:48:19,925 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2021-05-02 14:48:20,101 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-05-02 14:48:20,280 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2021-05-02 14:48:20,283 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-02 14:48:20,283 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-02 14:48:20,283 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-02 14:48:20,283 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:48:20,284 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 14:48:20,284 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:48:20,284 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:48:20,284 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 14:48:20,284 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:48:20,284 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:48:20,284 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-02 14:48:20,284 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-02 14:48:20,284 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-02 14:48:20,284 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-02 14:48:20,284 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~b~0 main_~a~0)) (.cse2 (= main_~p~0 1)) (.cse3 (= main_~s~0 1))) (or (and (= main_~r~0 0) .cse0 (= main_~y~0 (+ main_~x~0 main_~b~0)) .cse1 (<= 0 main_~b~0) (not (= main_~b~0 0)) (<= main_~y~0 2) .cse2 (= (+ main_~p~0 main_~q~0) 0) .cse3) (and (= main_~q~0 0) .cse0 (= main_~b~0 main_~y~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= main_~x~0 2) .cse1 (<= 1 main_~y~0) .cse2 .cse3))) [2021-05-02 14:48:20,284 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~x~0 2) (<= 0 main_~y~0) (<= main_~y~0 2)) [2021-05-02 14:48:20,284 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 59) no Hoare annotation was computed. [2021-05-02 14:48:20,285 INFO L194 CegarLoopUtils]: At program point L56(line 56) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~x~0 2)) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 2)) (.cse4 (= main_~s~0 1))) (or (and .cse0 (= (+ main_~a~0 main_~b~0) main_~y~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse1 (= main_~b~0 main_~a~0) .cse2 (= main_~p~0 1) .cse3 (= (+ main_~p~0 main_~q~0) 0) .cse4) (and (= main_~q~0 0) .cse0 (= main_~b~0 main_~y~0) .cse1 .cse2 .cse3 .cse4))) [2021-05-02 14:48:20,285 INFO L194 CegarLoopUtils]: At program point L54(line 54) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~b~0 main_~a~0)) (.cse2 (= main_~p~0 1)) (.cse3 (= main_~s~0 1))) (or (and (= main_~r~0 0) .cse0 (= main_~y~0 (+ main_~x~0 main_~b~0)) .cse1 (<= 0 main_~b~0) (not (= main_~b~0 0)) (<= main_~y~0 2) .cse2 (= (+ main_~p~0 main_~q~0) 0) .cse3) (and (= main_~q~0 0) .cse0 (= main_~b~0 main_~y~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= main_~x~0 2) .cse1 (<= 1 main_~y~0) .cse2 .cse3))) [2021-05-02 14:48:20,285 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 59) no Hoare annotation was computed. [2021-05-02 14:48:20,285 INFO L198 CegarLoopUtils]: For program point L38(lines 35 52) no Hoare annotation was computed. [2021-05-02 14:48:20,285 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse1 (= main_~q~0 0)) (.cse4 (<= main_~x~0 2)) (.cse5 (<= 1 main_~b~0)) (.cse0 (= main_~r~0 0)) (.cse2 (<= 1 main_~x~0)) (.cse3 (= main_~a~0 main_~x~0)) (.cse6 (<= main_~y~0 2)) (.cse7 (= main_~p~0 1)) (.cse8 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse1 (= (+ main_~r~0 1) 0) (<= (+ main_~y~0 main_~a~0) main_~x~0) .cse4 (< main_~b~0 2) .cse5 (<= 1 main_~y~0) (< 0 main_~a~0) .cse7 .cse8) (and .cse0 .cse2 .cse3 (= (+ main_~a~0 main_~b~0) main_~y~0) (<= 0 main_~b~0) (not (= main_~b~0 0)) .cse6 .cse7 (= (+ main_~p~0 main_~q~0) 0) .cse8))) [2021-05-02 14:48:20,285 INFO L194 CegarLoopUtils]: At program point L36-1(line 36) the Hoare annotation is: (let ((.cse1 (= main_~q~0 0)) (.cse4 (<= main_~x~0 2)) (.cse5 (<= 1 main_~b~0)) (.cse0 (= main_~r~0 0)) (.cse2 (<= 1 main_~x~0)) (.cse3 (= main_~a~0 main_~x~0)) (.cse6 (<= main_~y~0 2)) (.cse7 (= main_~p~0 1)) (.cse8 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse1 (= (+ main_~r~0 1) 0) (<= (+ main_~y~0 main_~a~0) main_~x~0) .cse4 (< main_~b~0 2) .cse5 (<= 1 main_~y~0) (< 0 main_~a~0) .cse7 .cse8) (and .cse0 .cse2 .cse3 (= (+ main_~a~0 main_~b~0) main_~y~0) (<= 0 main_~b~0) (not (= main_~b~0 0)) .cse6 .cse7 (= (+ main_~p~0 main_~q~0) 0) .cse8))) [2021-05-02 14:48:20,285 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 59) the Hoare annotation is: true [2021-05-02 14:48:20,285 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-02 14:48:20,285 INFO L198 CegarLoopUtils]: For program point L57(line 57) no Hoare annotation was computed. [2021-05-02 14:48:20,285 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2021-05-02 14:48:20,285 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2) (<= 0 main_~y~0) (<= main_~y~0 2)) [2021-05-02 14:48:20,286 INFO L194 CegarLoopUtils]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~y~0 2)) (.cse2 (= main_~p~0 1)) (.cse3 (= main_~s~0 1))) (or (and (= main_~r~0 0) .cse0 (= main_~y~0 (+ main_~x~0 main_~b~0)) (= main_~b~0 main_~a~0) (<= 0 main_~b~0) (not (= main_~b~0 0)) .cse1 .cse2 (= (+ main_~p~0 main_~q~0) 0) .cse3) (and (= main_~q~0 0) .cse0 (= main_~b~0 main_~y~0) (<= main_~x~0 2) (<= 1 main_~y~0) .cse1 .cse2 .cse3))) [2021-05-02 14:48:20,286 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-02 14:48:20,286 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-02 14:48:20,286 INFO L198 CegarLoopUtils]: For program point L43(lines 43 51) no Hoare annotation was computed. [2021-05-02 14:48:20,286 INFO L194 CegarLoopUtils]: At program point L43-2(lines 35 52) the Hoare annotation is: (let ((.cse1 (= main_~q~0 0)) (.cse4 (<= main_~x~0 2)) (.cse5 (<= 1 main_~b~0)) (.cse0 (= main_~r~0 0)) (.cse2 (<= 1 main_~x~0)) (.cse3 (= main_~a~0 main_~x~0)) (.cse6 (<= main_~y~0 2)) (.cse7 (= main_~p~0 1)) (.cse8 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse1 (= (+ main_~r~0 1) 0) (<= (+ main_~y~0 main_~a~0) main_~x~0) .cse4 (< main_~b~0 2) .cse5 (<= 1 main_~y~0) (< 0 main_~a~0) .cse7 .cse8) (and .cse0 .cse2 .cse3 (= (+ main_~a~0 main_~b~0) main_~y~0) (<= 0 main_~b~0) (not (= main_~b~0 0)) .cse6 .cse7 (= (+ main_~p~0 main_~q~0) 0) .cse8))) [2021-05-02 14:48:20,286 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (let ((.cse1 (= main_~q~0 0)) (.cse3 (= main_~b~0 main_~y~0)) (.cse5 (<= main_~x~0 2)) (.cse6 (<= 1 main_~b~0)) (.cse0 (= main_~r~0 0)) (.cse2 (<= 1 main_~x~0)) (.cse4 (= main_~a~0 main_~x~0)) (.cse7 (<= main_~y~0 2)) (.cse8 (= main_~p~0 1)) (.cse9 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9) (and .cse1 (<= (+ main_~a~0 main_~b~0) 2) .cse2 .cse3 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse5 .cse6 (< 0 main_~a~0) .cse8 .cse9) (and .cse0 .cse2 .cse4 (= main_~y~0 (+ main_~x~0 main_~b~0)) (<= 0 main_~b~0) (not (= main_~b~0 0)) .cse7 .cse8 (= (+ main_~p~0 main_~q~0) 0) .cse9))) [2021-05-02 14:48:20,286 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-02 14:48:20,286 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-02 14:48:20,286 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-02 14:48:20,286 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-02 14:48:20,286 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-02 14:48:20,286 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-02 14:48:20,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:48:20 BoogieIcfgContainer [2021-05-02 14:48:20,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:48:20,298 INFO L168 Benchmark]: Toolchain (without parser) took 8280.86 ms. Allocated memory was 198.2 MB in the beginning and 306.2 MB in the end (delta: 108.0 MB). Free memory was 163.1 MB in the beginning and 119.9 MB in the end (delta: 43.3 MB). Peak memory consumption was 161.3 MB. Max. memory is 8.0 GB. [2021-05-02 14:48:20,298 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 179.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:48:20,298 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.67 ms. Allocated memory is still 198.2 MB. Free memory was 162.9 MB in the beginning and 180.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 14:48:20,298 INFO L168 Benchmark]: Boogie Preprocessor took 19.76 ms. Allocated memory is still 198.2 MB. Free memory was 180.9 MB in the beginning and 179.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:48:20,298 INFO L168 Benchmark]: RCFGBuilder took 288.58 ms. Allocated memory is still 198.2 MB. Free memory was 179.3 MB in the beginning and 163.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:48:20,298 INFO L168 Benchmark]: TraceAbstraction took 7796.47 ms. Allocated memory was 198.2 MB in the beginning and 306.2 MB in the end (delta: 108.0 MB). Free memory was 163.2 MB in the beginning and 119.9 MB in the end (delta: 43.3 MB). Peak memory consumption was 163.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:48:20,298 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 179.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 170.67 ms. Allocated memory is still 198.2 MB. Free memory was 162.9 MB in the beginning and 180.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.76 ms. Allocated memory is still 198.2 MB. Free memory was 180.9 MB in the beginning and 179.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 288.58 ms. Allocated memory is still 198.2 MB. Free memory was 179.3 MB in the beginning and 163.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7796.47 ms. Allocated memory was 198.2 MB in the beginning and 306.2 MB in the end (delta: 108.0 MB). Free memory was 163.2 MB in the beginning and 119.9 MB in the end (delta: 43.3 MB). Peak memory consumption was 163.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6356.8ms, OverallIterations: 11, TraceHistogramMax: 8, EmptinessCheckTime: 22.7ms, AutomataDifference: 1397.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1389.7ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 393 SDtfs, 232 SDslu, 1514 SDs, 0 SdLazy, 1082 SolverSat, 220 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 757.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 558 GetRequests, 461 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 691.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=8, InterpolantAutomatonStates: 93, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 138.5ms AutomataMinimizationTime, 11 MinimizatonAttempts, 18 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 77 PreInvPairs, 100 NumberOfFragments, 754 HoareAnnotationTreeSize, 77 FomulaSimplifications, 1621 FormulaSimplificationTreeSizeReduction, 116.8ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 1383 FormulaSimplificationTreeSizeReductionInter, 1260.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 90.1ms SsaConstructionTime, 242.2ms SatisfiabilityAnalysisTime, 1873.5ms InterpolantComputationTime, 561 NumberOfCodeBlocks, 561 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 1971 SizeOfPredicates, 49 NumberOfNonLiveVariables, 1772 ConjunctsInSsa, 235 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 558/625 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((r == 0 && q == 0) && 1 <= x) && b == y) && a == x) && x <= 2) && 1 <= b) && y <= 2) && p == 1) && s == 1) || (((((((((q == 0 && r + 1 == 0) && y + a <= x) && x <= 2) && b < 2) && 1 <= b) && 1 <= y) && 0 < a) && p == 1) && s == 1)) || (((((((((r == 0 && 1 <= x) && a == x) && a + b == y) && 0 <= b) && !(b == 0)) && y <= 2) && p == 1) && p + q == 0) && s == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...